Crash of a Pilatus PC-6/B2-H2 Turbo Porter in Grenchen

Date & Time: Jul 29, 1987 at 1535 LT
Operator:
Registration:
HB-FIM
Flight Phase:
Survivors:
Yes
Schedule:
Grenchen - Grenchen
MSN:
741
YOM:
1974
Country:
Region:
Crew on board:
1
Crew fatalities:
Pax on board:
8
Pax fatalities:
Other fatalities:
Total fatalities:
0
Captain / Total flying hours:
800
Captain / Total hours on type:
74.00
Aircraft flight hours:
4948
Circumstances:
The single engine aircraft departed Grenchen Airport on a local skydiving flight, carrying eight skydivers and one pilot. At the altitude of 1,000 meters, the instructor opened the door and the pilot stabilized the airplane and reduced the speed. The first skydiver bailed out and when the second skydiver was ready, the instructor realized his dorsal parachute bag was partially open and decided to push him outside the cabin. Immediately after, he heard a shock and saw that the horizontal stabilizer was damaged. It is believed that the first skydiver probably made an excessive traction on the strap which may cause the automatic open of the next skydiver. In such situation, all other skydivers and the instructor bailed out. The pilot attempted several times to stabilize the airplane but unable to reach Grenchen Aerodrome, he bailed out at a height of 300 meters. Out of control, the airplane crashed in an open field and was destroyed. All nine occupants were uninjured.
Probable cause:
The accident was the consequence of the following findings:
- Poor layout of the automatic opening system of the straps in the cabin,
- An horizontal stabilizer was damaged by parachute elements.
Final Report:

Crash of a Pilatus PC-6/B2-H2 Turbo Porter in Guapi: 3 killed

Date & Time: Jun 25, 1987
Operator:
Registration:
FAC-1114
Flight Phase:
Flight Type:
Survivors:
Yes
MSN:
823
YOM:
1983
Country:
Crew on board:
1
Crew fatalities:
Pax on board:
3
Pax fatalities:
Other fatalities:
Total fatalities:
3
Aircraft flight hours:
2300
Circumstances:
Two minutes after takeoff from Guapi-Juan Casiano Solis Airport, while climbing, the single engine aircraft went out of control and crashed, bursting into flames. A passenger was seriously injured while three other occupants were killed.

Crash of a Pilatus PC-6/B2-H2 Turbo Porter in Casale Monferrato

Date & Time: Apr 18, 1987
Operator:
Registration:
HB-FIS
Flight Phase:
Survivors:
Yes
Site:
Schedule:
Casale Monferrato - Casale Monferrato
MSN:
685
YOM:
1969
Country:
Region:
Crew on board:
1
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
0
Aircraft flight hours:
1938
Circumstances:
The single engine aircraft departed Casale Monferrato Airfield on a local skydiving flight. While in cruising altitude, all skydivers bailed out when the pilot lost control of the airplane that crashed on a residential area in Casale Monferrato. The pilot, sole on board, was injured.

Crash of a Pilatus PC-6/B1A-H2 Turbo Porter in Trelew

Date & Time: Sep 5, 1986 at 1200 LT
Operator:
Registration:
0684/6-G-2
Flight Phase:
Flight Type:
Survivors:
Yes
MSN:
2045
YOM:
1971
Country:
Crew on board:
0
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
0
Circumstances:
Crashed in unknown circumstances. There were no casualties.

Crash of a Pilatus PC-6/B2-H4 Turbo Porter in Haun: 1 killed

Date & Time: May 9, 1986 at 0948 LT
Operator:
Registration:
HB-FKC
Flight Phase:
Survivors:
Yes
Schedule:
Ampfing - Ampfing
MSN:
844
YOM:
1986
Country:
Region:
Crew on board:
1
Crew fatalities:
Pax on board:
9
Pax fatalities:
Other fatalities:
Total fatalities:
1
Captain / Total flying hours:
1625
Captain / Total hours on type:
1000.00
Circumstances:
The single engine aircraft departed Ampfing-Waldkraiburg Airfield for a local skydiving flight, carrying one pilot and nine skydivers. While the altitude of 3,500 meters was reached, the aircraft was over the target when a group of four skydivers bailed out. Few seconds later, while the second group was preparing to jump, the emergency parachute of a skydiver mistakenly opened while he was bailing out. The skydiver struck the right stabilizer that was torn off. The aircraft went out of control and the pilot was able to send a distress call before bailing out with the rest of the group. The aircraft crash landed in a field near Haun and was damaged beyond repair. All skydivers were found uninjured while the pilot was killed as his parachute failed to open.
Probable cause:
The exact cause of the accident could not be determined with certainty. However, it was reported that one of the skydiver struck the right stab after he bailed out and control was lost after the stab was torn off.
Final Report:

Crash of a Pilatus PC-6/B2-H2 Turbo Porter near Usillon: 1 killed

Date & Time: Feb 7, 1986
Operator:
Registration:
F-BIEL
Flight Phase:
Flight Type:
Survivors:
No
Site:
Schedule:
Courchevel - Geneva
MSN:
345
YOM:
1960
Country:
Region:
Crew on board:
1
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
1
Circumstances:
The pilot, sole on board, departed Courchevel Altiport on a positioning flight to Geneva-Cointrin Airport. En route, he encountered poor weather conditions when the single engine aircraft struck the slope of a mountain located near the Plateau des Glières, in the region of Usillon. The pilot was killed.

Crash of a Pilatus PC-6/B2-H2 Turbo Porter in Al Furt

Date & Time: Dec 4, 1985 at 1645 LT
Operator:
Registration:
HB-FIP
Flight Type:
Survivors:
Yes
Schedule:
Riyan – Al Furt – Aden
MSN:
842
YOM:
1985
Country:
Region:
Crew on board:
1
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
0
Captain / Total flying hours:
1071
Captain / Total hours on type:
289.00
Aircraft flight hours:
284
Circumstances:
The pilot, sole on board, was completing a cargo flight from Riyan to Aden with an intermediate stop in Al Furt. On approach to runway 35, he observed big birds standing near the runway threshold and opted for a downwind right hand short base landing. On short final, the single engine airplane stalled and crashed. The aircraft was destroyed and the pilot was seriously injured.
Probable cause:
The accident was the consequence of the following:
- Inappropriate flight technique,
- The last turn was completed below lift speed,
- Turbulences and windshear may have been contributing factors.
Final Report:

Crash of a Pilatus PC-6/C-H2 Turbo Porter in Nong Bua Tai: 8 killed

Date & Time: Sep 15, 1984
Operator:
Registration:
1607
Flight Phase:
Survivors:
No
MSN:
2065
YOM:
1972
Country:
Region:
Crew on board:
1
Crew fatalities:
Pax on board:
7
Pax fatalities:
Other fatalities:
Total fatalities:
8
Circumstances:
Crashed shortly after takeoff for unknown reasons, killing all eight occupants.

Crash of a Pilatus PC-6/B2-H2 Turbo Porter in Ferlach-Glainach: 7 killed

Date & Time: Jun 27, 1984 at 1500 LT
Operator:
Registration:
3G-EI
Flight Phase:
Flight Type:
Survivors:
No
Schedule:
Ferlach-Glainach - Ferlach-Glainach
MSN:
774
YOM:
1975
Country:
Region:
Crew on board:
1
Crew fatalities:
Pax on board:
6
Pax fatalities:
Other fatalities:
Total fatalities:
7
Circumstances:
The aircraft was engaged in a skydiving training mission in the region of Ferlach-Glainach Aerodrome, Carinthia. During the initial climb, at a height of 600 meters, the single engine nosed down and crashed in a wooded area, killing all seven occupants.
Crew:
Pichler Josef
Passengers:
Hoi Peter,
Meyerhofer Johann,
Schwaiger Alois,
Haller Gerhard,
Millinger Isidor +1.
Probable cause:
It is believed that the loss of control was the consequence of a weight & balance problem related to the CofG that was out of the enveloppe.

Crash of a Pilatus PC-6/B2-H2 Turbo Porter near Peterborough

Date & Time: Dec 18, 1983 at 1042 LT
Operator:
Registration:
G-BIZP
Flight Phase:
Survivors:
Yes
Schedule:
Peterborough - Peterborough
MSN:
812
YOM:
1981
Region:
Crew on board:
1
Crew fatalities:
Pax on board:
8
Pax fatalities:
Other fatalities:
Total fatalities:
0
Captain / Total flying hours:
2350
Captain / Total hours on type:
700.00
Circumstances:
The aircraft took off on the first flight of the day with eight parachutists, and a reported fuel load of 70 US gallons. At an altitude of approximately 11,000 feet it was decided that the cloud cover at that time was obscuring the dropping zone to an unacceptable degree, and so the detail was cancelled. During the subsequent descent, on rolling out of a left turn at about 4,500 feet, a bang was heard, and the left aileron was seen to have become partially detached. After a violent lateral oscillation of the control column lasting a few seconds, the right aileron also became partially detached. At this stage the parachutists successfully abandoned the aircraft on the orders of the pilot. The aircraft then adopted an angle of bank to the right of approximately 45° despite the application of full left rudder. The descent was continued until the pilot realized that the aircraft was approaching the village of Yarwell; he therefore applied engine power to ensure that the aircraft would clear the houses. The bank angle then increased to 60° and the aircraft struck the ground right wing low, coming to rest upright, and facing the opposite direction. The pilot sustained minor injuries, and there was no fire.
Probable cause:
Subsequent examination showed that, on each aileron, the centre of the three attachments to the wing had suffered an in-flight failure, leading to the subsequent detachment of one half of each aileron control surface. Detailed inspection revealed the presence of fatigue in each of the rear angle brackets, located within the wing, to which are attached the aileron supports. Preliminary indications are that the point of primary failure occurred at the left aileron rear angle bracket; the remaining brackets had failed subsequently as a result of overload.
Final Report: