Crash of a Douglas DC-9-32 in Zurich: 46 killed

Date & Time: Nov 14, 1990 at 2011 LT
Type of aircraft:
Operator:
Registration:
I-ATJA
Survivors:
No
Schedule:
Milan - Zurich
MSN:
47641
YOM:
1974
Flight number:
AZ404
Country:
Region:
Crew on board:
6
Crew fatalities:
Pax on board:
40
Pax fatalities:
Other fatalities:
Total fatalities:
46
Captain / Total flying hours:
10193
Captain / Total hours on type:
3194.00
Copilot / Total flying hours:
831
Copilot / Total hours on type:
621
Aircraft flight hours:
43894
Aircraft flight cycles:
43452
Circumstances:
On the 14th November 1990 ALITALIA flight 404, aircraft type DC-9-32 registration I-ATJA, took off from runway 36R at LIN bound for ZRH. The flight was a scheduled commercial flight. The clearance was to the destination airport Zürich, via a CANNE IC departure to Flight Level 120, the transponder code 0302. The PIC assumed the duties of assisting pilot and dealt with the radio-telephony. The First Officer was the handling pilot. The take-off was at 1836 hrs. The standard climb via CANNE towards Airway A9 to the cruising flight level of 200 was trouble free. About 2 minutes after reaching Flight Level 200 the crew listened to Zürich VOLMET. From this they gathered that the surface wind at Zürich was 240/08 kt. This led the PIC forsee a landing on runway 28. Having heard from the ATIS that the landing runway was 14, the crew still discussed a right hand circling approach for a landing on runway 28. The discussion continued considering a left hand circling to runway 28. At 1852.53 hrs, from a QNH of 1019 hPa the crew worked out a QFE of 970 hPa. During the descent, the crew discussed the approach procédure for runway 14, where the Copilot mentioned the Outer Marker height for runway 16. After the discussion about the setting of the navigation aids, they also discussed the procédure to be followed in the event of a communications failure. The crew were instructed that following radar vectors they should fly an ILS approach to runway 14. At 1900.01 hrs the Copilot said "We perform a CAT JJ (approach)". The PIC was in agreement because the navigation equipment had to be checked. Whilst verifying the décision height, it transpired that the Copilot was still Consulting the approach chart for runway 16. Further lengthy discussions about the setting of the required navigation aids followed. As the aircraft passed abeam Zürich descending to Flight Level 90, the PIC noted: "We are by KLOTEN, FL 90. He is bringing us in high". Clearance to descend to Flight Level 60 followed at 1902.28 hrs. At 1902.50 hrs ALITALIA 404 was instructed to fly heading 325. VHF NAV 1 was tuned to Trasadingen VOR (TRA), VHF NAV 2 to Kloten VOR (KLO). To define the fix at EKRON, the course 068 was also set. At 1904.32 hrs the PIC repeated "The outer marker is at 1200 ft (QFE), it can be verified by 3.8 [NM] from Kloten. Rhein (RHI NDB) 5.6 [NM]...". At 1905.15 hrs a new heading was required which the PIC confirmed. The identification of the ILS - 14 was registered on the CVR at 1905.32 hrs. At 1906.20 hrs, together with the approach clearance to runway 14, a new heading of 110, descent to 4000 ft and the QNH of 1019 hPa was given. The PIC confirmed this clearance, however the heading was read back as 120. The incorrect readback of the clearance by the PIC caused the Copilot some uncertainty of the required heading to be flown. The PIC confirmed the approach clearance and the cleared altitude 4000 ft to the COPI, whereby the COPI ordered "RADIO APPROACH...". At this point an altitude of about 5000 ft (QNH) was passed. One of the pilots asked the other whether he had a Glide Path indication. The aircraft position was just before interception of the Localiser passing an altitude of about 4700 ft (QNH) (according to radar and DFDR). It was already about 1300 ft below the Glide Path. Answering the question about the Glide Path, the other pilot replied (hardly understandable) "On 1...I don't have...." Consequently the PIC said: "Good, so let's do it on 1". The COPI then ordered "RADIO 1". The flaps were probably set to 15°. In the meantime, the aircraft had passed through the localiser and was now slightly east of it. About the same time as the PIC said "Capture LOC capture glide path capture - so we are on the localiser, a little off track but..." (translated from Italian) the aircraft descended through 4000 ft (QNH) (about 11.5 NM from the threshold runway 14). It was thus about 1200 ft below the glide path. The QFE 970 hPa was also set by the COPI. About 5 seconds later the Altitude Exit Alert was heard (Descent through 3700 ft [QNH]). The PIC cancelled the warning by setting 5000 ft (Go Around Altitude) on the Altitude Preselect. The PIC said to the COPI: "There is another one (Finnair 863) in front quite close. You can reduce even further to 150 (kt) otherwise we'll end up with a "go around". A discussion followed about possible icing. After this the flaps were set to 25 during which no Landing Gear horn was heard. At this point the aircraft was established on the localiser. The altitude was about 3000 ft QNH - ca. 1200 feet below the glide path. The PIC: "Outer Marker check is at 1250 ft [QFE]". The height was now about 1600 ft QFE. 10 seconds after Flaps 25, the flaps were set to 50. The Outer Marker height of 1250 ft QFE was now passed. The PIC said "Bravo" followed by sounds of switching. At 8 NM final the PIC mentioned "3.8 almost 4 miles". At about 7 NM final, (15 seconds after the PIC's words "Almost 4 miles") the COPI asked "... haven't we passed it?". After a further 12 seconds the COPI asked once again "Didn't we pass the outer marker?" The height was now 670 ft QFE. The PIC's answer was "No no it hasn't changed yet. At 6.6 NM final the PIC said "Oh it shows 7 The crew was now ordered by Zürich ARR to change frequency to Zürich TWR. At 6.25 NM final the pilots conversed as follows: "... That doesn't make sense to me "Nor to me ...". 2 seconds after this conversation the PIC called out "Pull, pull, pull, pull! ". Simultaneously autopilot disconnection could be heard. The position was now about 500 ft AGL overhead Weiach - about 350 ft QFE. 2 seconds later the COPI called out "GO AROUND" the PIC responded with "No no no no ... catch the glide". At this point the DFDR shows a pitch change from -2° [AND] to +5.4° [ANU]. At the same time the thrust was increased from 1.3 to 1.7 EPR. The sink rate decreased from 1100 ft/min. to 190 ft/min. After 11 seconds (the pitch oscillated at +1° [ANU]) the PIC asked "Can you hold it?" to which the COPI replied "Yes". One second after the COPI's answer the Radio Altimeter warning (pip pip pip) indicating 200 ft/AGL could be heard. During this, the PIC said "Hold on let's try to At 1911.18 hrs the aircraft Struck the north em slope of the Stadlerberg at a altitude of 1660 ft QNH. All 46 occupants were killed.
Probable cause:
The accident was caused by:
- False indication of VHF NAV unit No 1 in the aircraft.
- Probable altimeter misreading by the PIC.
- No GPWS warning in the cockpit.
- Pilots not aware of the possibility of incorrect indications in the NAV equipment in use (without flag-alarm).
- Inadequate failure analysis by the pilots.
- Non-compliance by the pilots with basic procédural instructions during the approach.
- Unsuitable cooperation between the pilots during the approach.
- COPI's initiated go-around procédure aborted by the PIC.
- The Approach Controller not observing the leaving of the cleared altitude of 4000 ft QNH before the FAP.
Final Report:

Crash of a Cessna 421B Golden Eagle II in Zurich

Date & Time: Dec 27, 1989 at 1735 LT
Registration:
9H-ABN
Flight Type:
Survivors:
Yes
Schedule:
Malta – Rome – Basel – Zurich – Rome – Malta
MSN:
421B-0007
YOM:
1970
Country:
Region:
Crew on board:
2
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
0
Captain / Total flying hours:
1375
Captain / Total hours on type:
262.00
Aircraft flight hours:
2094
Circumstances:
The crew was completing a training flight from Malta to Zurich and return with intermediate stops in Rome and Basel. While on an ILS approach to Zurich-Kloten Airport runway 14, while at an altitude of 600 meters, the twin engine aircraft deviated from the glide, proceeded to a flat attitude when it entered a rapid descent and crashed 1,500 meters short of runway. The aircraft was damaged beyond repair and both occupants were seriously injured.
Probable cause:
It was determined that the accident was the consequence of an aircraft that, while flying in cat I weather conditions, entered an excessive nose-down and unstabilized attitude while passing from IFR to VFR mode until it struck the ground before runway threshold. It is possible that the pilot suffered an optical illusion, which would remain a contributory factor as well as the fact that the windshield was covered by frost, reducing the pilot visibility.

Crash of a Piper PA-31T1 Cheyenne I in Neerach

Date & Time: Feb 15, 1983 at 1510 LT
Type of aircraft:
Operator:
Registration:
HB-LMT
Survivors:
Yes
Schedule:
Geneva - Zurich
MSN:
31T-8104017
YOM:
1981
Location:
Country:
Region:
Crew on board:
1
Crew fatalities:
Pax on board:
2
Pax fatalities:
Other fatalities:
Total fatalities:
0
Captain / Total flying hours:
1700
Captain / Total hours on type:
700.00
Circumstances:
On final approach to Zurich-Kloten Airport runway 14, after passing over the outer marker, both engines failed simultaneously. The pilot reduced his altitude and completed an emergency landing in a snow covered field located in Neerach, about 6,5 km short of runway threshold. All three occupants escaped with minor injuries while the aircraft was damaged beyond repair.
Probable cause:
Double engine failure on final approach caused by a fuel exhaustion. Poor flight preparation on part of the pilot who miscalculated the fuel quantity for the distance between Geneva and Zurich and failed to make a fuel stop at Bern Airport.
Final Report:

Crash of a Cessna 421B Golden Eagle II in Zurich

Date & Time: Dec 21, 1976 at 2031 LT
Registration:
HB-LGM
Survivors:
Yes
Schedule:
Ajaccio - Zurich
MSN:
421B-0226
YOM:
1972
Country:
Region:
Crew on board:
1
Crew fatalities:
Pax on board:
1
Pax fatalities:
Other fatalities:
Total fatalities:
0
Captain / Total flying hours:
584
Captain / Total hours on type:
9.00
Aircraft flight hours:
1753
Circumstances:
Following an uneventful flight from Ajaccio-Campo dell'Oro Airport, the pilot started the approach to runway 14 at Zurich-Kloten in poor weather conditions. By night and limited visibility, at an excessive speed of 180 knots, the pilot failed to realize his altitude was too low when the twin engine airplane struck the ground and crashed 1,700 metres short of runway 14. The aircraft was destroyed and both occupants were injured. At the time of the accident, weather conditions were as follow: wind calm, horizontal visibility over 100 metres, RVR of 400 metres for runway 14, freezing fog and vertical visibility less than 100 feet.
Probable cause:
The accident was the consequence of a controlled flight with ground during a night approach under CAT I conditions. The following contributing factors were reported:
- The pilot's experience on this type of aircraft was insufficient,
- The pilot failed to monitor his instruments,
- The aircraft was unstable on final approach,
- The airplane struck the ground without any corrective manoeuvre on part of the pilot who failed to initiate a go-around procedure,
- Poor weather conditions,
- Visibility below minimums,
- A CAT I approach to runway 14 was thoughtless,
- Excessive approach speed, 180 knots instead of the recommended 105-115 knots.

Crash of a Convair CV-640 in Tromsø

Date & Time: Jul 17, 1973 at 1645 LT
Type of aircraft:
Operator:
Registration:
HB-IMM
Survivors:
Yes
Schedule:
Zurich - Tromsø
MSN:
412
YOM:
1957
Flight number:
VS598
Location:
Country:
Region:
Crew on board:
4
Crew fatalities:
Pax on board:
56
Pax fatalities:
Other fatalities:
Total fatalities:
0
Captain / Total flying hours:
14500
Captain / Total hours on type:
2100.00
Copilot / Total flying hours:
1658
Copilot / Total hours on type:
684
Aircraft flight hours:
29827
Aircraft flight cycles:
26426
Circumstances:
Following an uneventful charter flight from Zurich, the crew started the approach to runway 19 in excellent weather conditions. Following a wrong approach configuration, the aircraft landed nose first. On touchdown, the nose gear collapsed and the airplane slid on its nose for several meters before both mains gears collapsed as well. The airplane slid on its belly for dozen meters, veered off runway to the left and came to rest in a grassy area. All 60 occupants were evacuated safely while the aircraft was damaged beyond repair.
Probable cause:
Wrong approach configuration on part of the captain who failed to follow several points of the approach procedure. The following factors were reported:
- The plane landed in a nose-down attitude, causing the nose gear to touchdown first and to collapse due to excessive g loads,
- The flaps were down at an angle of 40° while the company procedure did not allow more than 33°,
- The approach was completed with a tailwind of 10 knots, the maximum allowable speed,
- The captain failed to react in time and to initiate appropriate corrective actions.

Crash of a Dassault Falcon 20C in Samedan

Date & Time: Feb 20, 1972 at 1417 LT
Type of aircraft:
Operator:
Registration:
HB-VCG
Survivors:
Yes
Schedule:
Zurich - Samedan
MSN:
231
YOM:
1970
Country:
Region:
Crew on board:
3
Crew fatalities:
Pax on board:
2
Pax fatalities:
Other fatalities:
Total fatalities:
0
Captain / Total flying hours:
12849
Captain / Total hours on type:
1685.00
Copilot / Total flying hours:
2569
Copilot / Total hours on type:
1930
Aircraft flight hours:
742
Circumstances:
While descending to Samedan Airport, weather conditions worsened rapidly. Despite the situation, the captain decided to continue the approach under VFR mode. In a limited visibility of 2 km in snow falls, the pilot-in-command passed over Lake Silvaplana at low height then initiated a right turn when the right wing tip struck the icy water. The airplane crash landed and slid for 200 meters before coming to rest. All five occupants were injured and the aircraft was written off.
Probable cause:
Poor flight preparation on part of the flying crew who failed to take into consideration the weather deterioration. At the time of the accident, the approach speed was too high while the altitude was too low. It was determined that the pilot-in-command took the decision to continue the approach under VFR mode in IMC conditions.