Crash of a Harbin Yunsunji Y-12-II in Nouakchott: 7 killed

Date & Time: Jul 12, 2012 at 0745 LT
Type of aircraft:
Operator:
Registration:
5T-MAE
Flight Phase:
Flight Type:
Survivors:
No
Schedule:
Nouakchott - Tasiast
Country:
Region:
Crew on board:
2
Crew fatalities:
Pax on board:
5
Pax fatalities:
Other fatalities:
Total fatalities:
7
Circumstances:
The twin engine aircraft was engaged in a special flight to the Tasiast Airstrip deserving the Gold Mine of Tasiast on behalf of the Kinross Gold Corporation. Shortly after take off from Nouakchott, while in initial climb, the aircraft stalled and crashed in a desert area located past the runway end, bursting into flames. All seven occupants were killed and aircraft was destroyed by impact forces and a post crash fire. Both pilots were Mauritanian Customs Officers while among the passengers were three Security Officers of the Kinross Gold Corporation who were in charge to transfer a load of gold back to Nouakchott.

Crash of a Grumman G-159 Gulfstream GI in Pweto

Date & Time: Jun 20, 2012
Type of aircraft:
Registration:
9Q-CIT
Survivors:
Yes
Schedule:
Lubumbashi - Pweto
MSN:
193
YOM:
1968
Location:
Region:
Crew on board:
2
Crew fatalities:
Pax on board:
3
Pax fatalities:
Other fatalities:
Total fatalities:
0
Circumstances:
Following an uneventful charter flight from Lubumbashi-Lueno Airport, the crew made a steep approach followed by a hard landing. The aircraft bounced and climbed to a height of about 20 feet, landed again and went out of control. It veered off runway to the left, collided with a rocky embankment, lost its undercarriage and came to rest, broken in several pieces. All five occupants escaped uninjured while the airplane was destroyed.
Probable cause:
Wrong approach configuration after the crew made a sharp turn late on final to join the glide. The rate of descent was excessive during the last segment, causing the aircraft to land hard and to bounce. Due to excessive g-loads and aerodynamic forces, the airplane went out of control.

Crash of a McDonnell Douglas MD-83 in Lagos: 159 killed

Date & Time: Jun 3, 2012 at 1545 LT
Type of aircraft:
Operator:
Registration:
5N-RAM
Survivors:
No
Site:
Schedule:
Abuja - Lagos
MSN:
53019/1783
YOM:
1990
Flight number:
DAV992
Country:
Region:
Crew on board:
6
Crew fatalities:
Pax on board:
147
Pax fatalities:
Other fatalities:
Total fatalities:
159
Captain / Total flying hours:
18116
Captain / Total hours on type:
7466.00
Copilot / Total flying hours:
1143
Copilot / Total hours on type:
808
Aircraft flight hours:
60850
Aircraft flight cycles:
35220
Circumstances:
On 3rd June, 2012 at about 1545:00hrs, 5N-RAM, a Boeing MD-83, a domestic scheduled commercial flight, operated by Dana Airlines (Nig.) Limited as flight 0992 (DANACO 0992), crashed into a densely populated area of Iju-Ishaga, a suburb of Lagos, following engine number 1 loss of power seventeen minutes into the flight and engine number 2 loss of power while on final approach to Murtala Muhammed Airport Lagos, Nigeria. Visual Meteorological Conditions prevailed at the time and the airplane was on an instrument flight plan. All 153 persons onboard the airplane, including the six crew were fatally injured. There were also six confirmed ground fatalities. The airplane was destroyed. There was post impact fire. The flight originated at Abuja (ABV) and the destination was Lagos (LOS). The airplane was on the fourth flight segment of the day, consisting of two round-trips between Lagos and Abuja. The accident occurred during the return leg of the second trip. DANACO 0992 was on final approach to runway 18R at LOS when the crew declared a Mayday call “Dual Engine Failure – negative response from the throttles.” According to records, the flight arrived ABV as Dana Air flight 0993 at about 1350:00hrs and routine turn-around activities were carried out. DANACO 0992 initiated engine start up at 1436:00hrs. Abuja Control Tower cleared the aircraft to taxi to the holding point of runway 04. En-route ATC clearance was passed on to DANACO 0992 on approaching holding point of runway 04. According to the ATC ground recorder transcript, the aircraft was cleared to line-up on runway 04 and wait, but the crew requested for some time before lining-up. DANACO 0992 was airborne at 1458:00hrs after reporting a fuel endurance of 3 hours 30 minutes. The aircraft made contact with Lagos Area Control Centre at 1518:00hrs and reported 1545:00hrs as the estimated time of arrival at LOS at cruising altitude of 26,000 ft. The Cockpit Voice Recorder (CVR) retained about 30 minutes 53 seconds of the flight and started recording at 1513:44hrs by which time the Captain and First Officer (F/O) were in a discussion of a non-normal condition regarding the correlation between the engine throttle setting and an engine power indication. However, they did not voice concerns then that the condition would affect the continuation of the flight. The flight crew continued to monitor the condition and became increasingly concerned as the flight transitioned through the initial descent from cruise altitude at 1522:00hrs and the subsequent approach phase. DANACO 0992 reported passing 18,100ft and 7,700ft, at 1530:00hrs and 1540:00hrs respectively. After receiving radar vectors in heading and altitude from the Controller, the aircraft was issued the final heading to intercept the final approach course for runway 18R. According to CVR transcript, at 1527:30hrs the F/O advised the Captain to use runway 18R for landing and the request was made at 1531:49hrs and subsequently approved by the Radar Controller. The crew accordingly changed the decision height to correspond with runway 18R. At 1531:12hrs, the crew confirmed that there was no throttle response on the left engine and subsequently the Captain took over control as Pilot Flying (PF) at 1531:27hrs. The flight was however continued towards Lagos with no declaration of any distress message. With the confirmation of throttle response on the right engine, the engine anti-ice, ignition and bleed-air were all switched off. At 1532:05hrs, the crew observed the loss of thrust in No.1 Engine of the aircraft. During the period between 1537:00hrs and 1541:00hrs, the flight crew engaged in prelanding tasks including deployment of the slats, and extension of the flaps and landing gears. At 1541:46hrs the First Officer inquired, "both engines coming up?" and the Captain replied “negative” at 1541:48hrs. The flight crew subsequently discussed and agreed to declare an emergency. At 1542:10hrs, DANACO 0992 radioed an emergency distress call indicating "dual engine failure . . . negative response from throttle." At 1542:35hrs, the flight crew lowered the flaps further and continued with the approach and discussed landing alternatively on runway 18L. At 1542:45hrs, the Captain reported the runway in sight and instructed the F/O to retract the flaps and four seconds later to retract the landing gears. At 1543:27hrs, the Captain informed the F/O, "we just lost everything, we lost an engine. I lost both engines". During the next 25 seconds until the end of the CVR recording, the flight crew attempted to recover engine power without reference to any Checklist. The airplane crashed into a densely populated residential area about 5.8 miles north of LOS. The airplane wreckage was approximately on the extended centreline of runway 18R, with the main wreckage concentrated at N 06o 40.310’ E 003o 18.837' coordinates, with elevation of 177ft. During the impact sequence, the airplane struck an uncompleted building, two trees and three other buildings. The wreckage was confined in a small area, with the separated tail section and engines located at the beginning of the debris trail. The airplane was mostly consumed by post crash fire. The tail section, both engines and portions of both wings representing only about 15% of the airplane, were recovered from the accident site for further examination.
Probable cause:
Probable Causal Factors:
1. Engine number 1 lost power seventeen minutes into the flight, and thereafter on final approach, Engine number 2 lost power and failed to respond to throttle movement on demand for increased power to sustain the aircraft in its flight configuration.
2. The inappropriate omission of the use of the Checklist, and the crew’s inability to appreciate the severity of the power-related problem, and their subsequent failure to land at the nearest suitable airfield.
3. Lack of situation awareness, inappropriate decision making, and poor airmanship.

Tear down of the engines showed that the no.1 engine was overhauled in the U.S in August 2011 and was not in compliance with Service Bulletin SB 6452. Both engines had primary and secondary fuel manifold assemblies fractured, cracked, bent, twisted or pinched which led to fuel leaks, fuel discharge to bypass duct, loss of engine thrust and obvious failure of engine responding to
throttle movement. This condition was similar to the no.1 engine of a different Dana Air MD-80, 5N-SAI, that was involved in an incident in October 2013 when the aircraft returned to the departure airport with the engine not responding th throttle movements. This engine also was not in compliance with Service Bulletin SB 6452. This bulletin was issued in 2003 and called for the installation of new secondary fuel manifold assemblies, incorporating tubes fabricated from new material which has a fatigue life that was approximately 2 times greater than the previous tube material.
Final Report:

Crash of a Boeing 727-221F in Accra: 10 killed

Date & Time: Jun 2, 2012 at 1910 LT
Type of aircraft:
Operator:
Registration:
5N-BJN
Flight Type:
Survivors:
Yes
Schedule:
Lagos - Accra
MSN:
22540/1796
YOM:
1982
Flight number:
DHC111
Country:
Region:
Crew on board:
4
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
10
Captain / Total flying hours:
14000
Captain / Total hours on type:
1464.00
Copilot / Total flying hours:
22463
Copilot / Total hours on type:
4180
Aircraft flight hours:
40251
Aircraft flight cycles:
25380
Circumstances:
On 2nd June, 2012 at 1828hrs Allied Air Ltd Flight DHV 111, a Boeing 727-221 Cargo aircraft, Registration: 5N-BJN, departed Murtala Muhammed International Airport, Ikeja, Lagos-Nigeria to Kotoka International Airport, estimating Accra, Ghana at 1904hrs, en-route to Abidjan. While taxiing for take-off, the Flight Engineer observed that the CSD amber light (caution) had illuminated on the panel. With the Captain’s permission, it was disconnected. The flight was cleared Flight Level 240 and to maintain by Accra Area Control on 130.9MHz. The Flight was operating under Instrument Flight Rules (IFR) conditions and the flight was turbulent, the aircraft was cruising at a speed of 280kts which is the recommended turbulence speed. On the descent into Accra, the aircraft was cleared by Accra Approach on 119.5MHz initially to Flight Level 50 and later cleared to 2000ft. It was again instructed to climb to 3000ft due to high ground. On arrival at Accra, the Captain flew an Instrument Landing System (ILS) coupled approach, until he saw the runway. He then disconnected the autopilot at 500ft and manually flew the aircraft. After disconnecting the auto-pilot, he came into heavy IMC conditions in rain. The aircraft experienced an unstable approach at a high speed of 167kts and landed with a wind of 050/15kts at 154 kts and about 5807 ft from Runway 21 in nil visibility. The crew deployed thrust reversers and applied the normal brakes as well as the emergency pneumatic brakes but these actions were ineffective to stop the aircraft. Normally deploying the thrust reversers or applying the brakes would bring the nose wheel down. However, the nose gear was kept up. The speed brakes were not deployed. The crew reported seeing red lights rushing towards them soon after the main wheels touched the ground for the landing run. The aircraft nose gear never touched the ground until the aircraft went over the fence wall. A Lufthansa Flight DLH 566 operated on behalf of Lufthansa (LH) by Private Air which had landed earlier at 1902hrs reported a wind of 050/15kts and visibility of 3800m in rain. From the 2nd intersection where DLH 566 had stopped, ready to backtrack Runway 21, the crew observed Allied Air appeared to have landed at very high speed when the aircraft went past and could not determine whether the aircraft was taking off. A Lufthansa ground engineer who was waiting at the intersection to receive DLH 566 indicated the approximate touchdown point of DHV 111. Both the controller at the Tower and the Marshaller in the “follow me” vehicle waiting at the 1st Intersection saw Allied Air land between the 1st and 2nd intersections. The FDR indicated that the aircraft landed 4000 ft to the end of Runway 21. The full length of Runway 21 is 3403 m (11,162ft for take-off) but available for landing is 2990 m (9,807 ft). The FDR readout showed that the aircraft landed at 150 kts, and at 1.6 G, 5807 ft from the beginning of Runway 21 and 4000ft from the threshold of the Runway 03. The runway surface condition for braking as described by DLH crew was good. Shortly after Turkish Airline (THY 629) had landed, DLH 566 also landed followed by DHV 111. The aircraft over-run the runway and destroyed the Threshold Lights and the Approach lights on Runway 03. It knocked out the ILS Localizer transmitter structure and mounts, broke through the airport perimeter wall. The aircraft crossed Giffard Road, collided with a passenger mini bus killing all ten (10) persons on board. It uprooted a tree by the road side before finally coming to a stop at an open space near El-Wak Sport Stadium. The Emergency Locator Transmitter (ELT) was triggered by the impact. The right side of a taxi cab on the road was grazed by flying debris from the localizer transmitter structures carried along by the right wing of the aircraft. The leading edge of the wing was extensively damaged. The aircraft came to a rest outside the airport perimeter wall 1171 ft (350m) from the Threshold of Runway 03, heading 215° southwest, coordinates 05 35 13.67N 000o 10 29.20W. The four (4) crew members sustained minor injuries. The aircraft and the mini bus were all destroyed. At 1910hrs, RFFS was alerted by the Tower Controller through the crash alarm bell. It took 9 minutes for the firemen to get to the crash site. The Airport was closed for 45minutes during which runway inspection was carried out. No pool of water was found anywhere on the runway. Approximately one hour after the aircraft had over-run the runway, the Airport was re-opened to traffic. Other airlines including KLM and British Airways, landed. Even though the Technical Log Book had no records of deferred defect, the Captain in an interview said the windshield wipers where switched on during the landing phase but were unable to clear the rain. It was observed during the investigation that the windshield wipers were rather ¾ switched on.
Probable cause:
The probable causes of the accident were:
The decision of the Captain to continue with the landing instead of aborting at the missed approach point especially when he could hardly see through the windshield and when he did not know how far he had gone down the runway because of the rain and the tail wind components.
Contributory factors:
a. The Captain disconnected the auto-pilot and flew the aircraft manually in an unstable approach.
b. The Captain landed the aircraft at 4000ft to the threshold of Runway 03, 6060ft from Runway 21. He could not stop within the available distance.
c. The Captain chose to land with a tailwind of 050/15Kts in excess of maximum allowable tailwind of 10Kts.
d. The crew concentrated on tracking the Localizer rather than watching for threshold and runway edge lights. They suffered from fixation.
e. The Captain did not deploy speed brakes on landing.
Final Report:

Crash of a Cessna 208B Grand Caravan in Yambio

Date & Time: May 2, 2012 at 1055 LT
Type of aircraft:
Operator:
Registration:
5Y-NGO
Flight Type:
Survivors:
Yes
Schedule:
Juba - Yambio
MSN:
208B-0322
YOM:
1992
Country:
Region:
Crew on board:
2
Crew fatalities:
Pax on board:
9
Pax fatalities:
Other fatalities:
Total fatalities:
0
Circumstances:
It was reported that the aircraft had taken-off from Juba for Yambio, Sothern Sudan with two crew members and nine passengers onboard. The flight was uneventful up to and until after touchdown, twenty metres after the threshold of runway 03, when it was noted that the aircraft steadily veered to the left. Efforts by the captain to prompt the pilot flying and intercession by taking control of the aircraft and initiating the necessary corrective measures by applying full right rudder yielded no positive results. The aircraft left wheel entered the trench at high speed, causing the aircraft to flip over and crash 200metrs from threshold of runway 03 and came rest in an inverted position. All persons exited safely on their own, except two passengers who were assisted by the captain to disembark. The captain used the portable fire extinguisher to put off the fire that flickered in the engine compartment. The flying pilot sustained injuries on his right foot, while the other passengers were reported to have hard minor injuries. The prevailing weather at the time of occurrence was reported as CAVOK (clear sky, and visibility better than 10Km) with calm North Easterly winds (030/05).
Final Report:

Crash of an Antonov AN-24RV in Galkayo

Date & Time: Apr 28, 2012 at 1433 LT
Type of aircraft:
Operator:
Registration:
3X-GEB
Survivors:
Yes
Schedule:
Hargeisa - Galkayo
MSN:
3 73 084 03
YOM:
1973
Flight number:
6J711
Country:
Region:
Crew on board:
4
Crew fatalities:
Pax on board:
32
Pax fatalities:
Other fatalities:
Total fatalities:
0
Circumstances:
Following an uneventful flight from Hargeisa, the crew started the descent to Galkayo-Abdullahi Yusuf Airport runway 05L. On short final, at a height of about 5-7 feet, the captain spotted an animal crossing the runway from left to right. He attempted to extend the flare in order to avoid a collision but the aircraft subsequently touched down hard and bounced several times. Out of control, it veered off runway and came to rest with both wings partially detached. All 36 occupants evacuated safely while the aircraft was damaged beyond repair.

Crash of a Fokker F27 Friendship 500 in Yida

Date & Time: Apr 15, 2012 at 1321 LT
Type of aircraft:
Operator:
Registration:
5Y-SRJ
Flight Type:
Survivors:
Yes
Schedule:
Lokichogio - Yida
MSN:
10372
YOM:
1968
Country:
Region:
Crew on board:
3
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
0
Circumstances:
The aircraft departed Lokichoggio Airport at 1103LT on a cargo flight to Yida, carrying three crew members and a load consisting of food. En route, while cruising at an altitude of 16,000 feet, the right engine failed. The crew was able to restart it but it failed again few minutes later. The crew started the approach on one engine and landed uneventfully. While decelerating, the nose gear collapsed and the aircraft came to rest. All three crew members escaped uninjured while the aircraft was damaged beyond repair. Both engines accumulated about 20 hours since the last overhaul and it is believed that the nose gear failed due to fatigue cracks.

Crash of a De Havilland DHC-8-Q311 in Kigoma

Date & Time: Apr 9, 2012 at 1014 LT
Operator:
Registration:
5H-MWG
Flight Phase:
Survivors:
Yes
Schedule:
Kigoma - Tabora - Dar es-Salaam
MSN:
462
YOM:
1997
Flight number:
ATC119
Country:
Region:
Crew on board:
4
Crew fatalities:
Pax on board:
35
Pax fatalities:
Other fatalities:
Total fatalities:
0
Circumstances:
During the takeoff roll on runway 34, the right engine failed. The captain rejected takeoff and initiated an emergency braking procedure. Unable to stop within the remaining distance (runway 34 is 1,767 metres long), the aircraft overran when the right main gear hit a pot hole, causing the right wing to be torn off. The aircraft slid for few dozen metres before coming to rest in a pasture. Two passengers were injured while 37 other occupants escaped unhurt. The aircraft was destroyed.

Crash of an Avro 748-287-2B in Doro

Date & Time: Apr 2, 2012
Type of aircraft:
Registration:
5Y-BZR
Flight Type:
Survivors:
Yes
MSN:
1737
YOM:
1975
Country:
Region:
Crew on board:
3
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
0
Circumstances:
On final approach to Doro Airport, while performing a cargo flight, the aircraft impacted ground short of runway and came to rest. All three crew members escaped uninjured while the aircraft was damaged beyond repair.

Crash of a Fokker 50 in Wau

Date & Time: Mar 29, 2012 at 0945 LT
Type of aircraft:
Operator:
Registration:
ST-NEX
Survivors:
Yes
Schedule:
Juba - Wau
MSN:
20248
YOM:
1992
Flight number:
FDD360
Country:
Region:
Crew on board:
5
Crew fatalities:
Pax on board:
50
Pax fatalities:
Other fatalities:
Total fatalities:
0
Circumstances:
The aircraft was carrying 50 passengers and a crew of five from Juba to Wau. After landing, the left main gear collapsed. The aircraft skidded on the 2,175 metres long and unpaved runway, veered off and came to rest with its nose gear torn off. While all five crew members were injured, all 50 passengers escaped uninjured. The aircraft was damaged beyond repair. The airport reported that the first part of runway 09 was closed due to work in progress since three months. It appears from various sources that the airline reported there was no NOTAM indicating the work in progress to resurface the runway and tower did not advise about the work in progress, too. Due to the slope of the runway it was impossible to see the workers on the runway in time. After landing, the aircraft impacted obstacles and went out of control.