Narrative:
A Saab 2000, registered N686PA, was substantially damaged when it experienced a runway excursion after landing on runway 13 at Unalaska Airport, Alaska.
The aircraft departed Anchorage, Alaska, USA at 15:15 hours local time, bound for Unalaska. As the flight descended towards Unalaska, it was cleared for the RNAV runway 13 approach. During the descent and approach the wind changed from 210 degrees at 8 knots, gusting to 14 knots, to 180 degrees at 7 knots. During the approach, the winds were reported as 270 degrees at 10 knots.
A go-around was executed as the aircraft was not stabilized on the approach, The flight returned for a visual approach to runway 13. Winds increased and during the second approach the controller reported winds of 300 degrees at 24 knots.
At 17:40 the aircraft touched down about 1,000 feet down the 4,500 feet long runway and the captain initiated reverse thrust and normal wheel-braking. The captain stated that he went to maximum braking around the 80 knot call. The flight crew reported that they attempted to steer the airplane to the right at the end of the runway to avoid going into the water.
The airplane then departed the runway and overrun area, traversed a section of grass, impacted a 3- to 4-ft high chain-linked perimeter fence with evidence of left engine propeller contact, crossed a ditch, impacted a large rock, and crossed a public roadway. The left wing or left engine propeller struck a 4 to 5 ft vertical signal post on the opposite shoulder of the road and the left propeller struck a 6 to 8-ft high yellow diamond shaped road sign. The left hand prop shattered, sending pieces into and through the fuselage. One propeller blade was found inside the fuselage.
Two people were critically injured. One passenger died of injuries the next day.
The the probable cause of this accident was the landing gear manufacturer's incorrect wiring of the wheel speed transducer harnesses on the left MLG during overhaul. The incorrect wiring caused the antiskid system not to function as intended, resulting in the failure of the left outboard tire and a significant loss of the airplane's braking ability, which led to the runway overrun. Contributing to the accident were (1) Saab's design of the wheel speed transducer wire harnesses, which did not consider and protect against human error during maintenance; (2) the FAA's lack of consideration of the RSA dimensions at DUT during the authorization process that allowed the Saab 2000 to operate at the airport; and (3) the flight crewmembers' inappropriate decision, due to their plan continuation bias, to land on a runway with a reported tailwind that exceeded the airplane manufacturer's limit. The safety margin was further reduced because of PenAir's failure to correctly apply its company-designated PIC airport qualification policy, which allowed the accident captain to operate at one of the most challenging airports in PenAir's route system with limited experience at the airport and in the Saab 2000.?
Brake problem
Runway excursion (overrun)
» thecordovatimes.com
» ADN
» NTSB update
PADU 180056Z 31011KT 10SM FEW034 BKN047 BKN060 07/01 A2950 RMK AO2 SLP995 T00720011
01:56 UTC / 17:56 local time:
PADU 180156Z 30021G27KT 5SM -RA BKN039 06/02 A2953 RMK AO2 PK WND 30027/0154 RAB41 SLP004 P0002 T00560017
02:56 UTC / 18:56 local time:
PADU 180256Z 25004KT 10SM BKN035 BKN044 BKN120 07/02 A2952 RMK AO2 RAE14 SLP002 ACSL NE P0002 60004 T00670017 53003
23:56 UTC / 14:56 local time:
PADU 172356Z 31006KT 10SM BKN036 BKN044 07/01 A2951 RMK AO2 RAB12E25 SLP999 P0000 60000 T00670011 10083 20056 53005
accident date: 17-10-2019
type: Saab 2000
registration: N686PA
accident date: 17-10-2019
type: Saab 2000
registration: N686PA
accident date: 17-10-2019
type: Saab 2000
registration: N686PA
accident date: 17-10-2019
type: Saab 2000
registration: N686PA
accident date: 17-10-2019
type: Saab 2000
registration: N686PA
accident date: 17-10-2019
type: Saab 2000
registration: N686PA
accident date: 17-10-2019
type: Saab 2000
registration: N686PA
accident date: 17-10-2019
type: Saab 2000
registration: N686PA
accident date: 17-10-2019
type: Saab 2000
registration: N686PA
Plot of FDR aircraft basic parameters during 2nd approach to DUT and landing
Plot of FDR parameters relating to aircraft deceleration during the touchdown and accident sequence
Flight track
N686PA
| Status: | Accident investigation report completed and information captured |
| Date: | Thursday 17 October 2019 |
| Time: | 17:40 |
| Type: |  Saab 2000 |
| Operator: | PenAir - Peninsula Airways |
| Registration: | N686PA |
| MSN: | 2000-017 |
| First flight: | 1995-04-09 (24 years 7 months) |
| Engines: | 2 Allison AE2100A |
| Crew: | Fatalities: 0 / Occupants: 3 |
| Passengers: | Fatalities: 1 / Occupants: 39 |
| Total: | Fatalities: 1 / Occupants: 42 |
| Aircraft damage: | Substantial |
| Aircraft fate: | Written off (damaged beyond repair) |
| Location: | Unalaska-Tom Madsen Airport, AK (DUT) ( United States of America)
|
| Phase: | Landing (LDG) |
| Nature: | Domestic Scheduled Passenger |
| Departure airport: | Anchorage-Ted Stevens International Airport, AK (ANC/PANC), United States of America |
| Unalaska-Tom Madsen Airport, AK (DUT/PADU), United States of America | |
| Flightnumber: | AS3296 |
A Saab 2000, registered N686PA, was substantially damaged when it experienced a runway excursion after landing on runway 13 at Unalaska Airport, Alaska.
The aircraft departed Anchorage, Alaska, USA at 15:15 hours local time, bound for Unalaska. As the flight descended towards Unalaska, it was cleared for the RNAV runway 13 approach. During the descent and approach the wind changed from 210 degrees at 8 knots, gusting to 14 knots, to 180 degrees at 7 knots. During the approach, the winds were reported as 270 degrees at 10 knots.
A go-around was executed as the aircraft was not stabilized on the approach, The flight returned for a visual approach to runway 13. Winds increased and during the second approach the controller reported winds of 300 degrees at 24 knots.
At 17:40 the aircraft touched down about 1,000 feet down the 4,500 feet long runway and the captain initiated reverse thrust and normal wheel-braking. The captain stated that he went to maximum braking around the 80 knot call. The flight crew reported that they attempted to steer the airplane to the right at the end of the runway to avoid going into the water.
The airplane then departed the runway and overrun area, traversed a section of grass, impacted a 3- to 4-ft high chain-linked perimeter fence with evidence of left engine propeller contact, crossed a ditch, impacted a large rock, and crossed a public roadway. The left wing or left engine propeller struck a 4 to 5 ft vertical signal post on the opposite shoulder of the road and the left propeller struck a 6 to 8-ft high yellow diamond shaped road sign. The left hand prop shattered, sending pieces into and through the fuselage. One propeller blade was found inside the fuselage.
Two people were critically injured. One passenger died of injuries the next day.
Probable Cause:
The the probable cause of this accident was the landing gear manufacturer's incorrect wiring of the wheel speed transducer harnesses on the left MLG during overhaul. The incorrect wiring caused the antiskid system not to function as intended, resulting in the failure of the left outboard tire and a significant loss of the airplane's braking ability, which led to the runway overrun. Contributing to the accident were (1) Saab's design of the wheel speed transducer wire harnesses, which did not consider and protect against human error during maintenance; (2) the FAA's lack of consideration of the RSA dimensions at DUT during the authorization process that allowed the Saab 2000 to operate at the airport; and (3) the flight crewmembers' inappropriate decision, due to their plan continuation bias, to land on a runway with a reported tailwind that exceeded the airplane manufacturer's limit. The safety margin was further reduced because of PenAir's failure to correctly apply its company-designated PIC airport qualification policy, which allowed the accident captain to operate at one of the most challenging airports in PenAir's route system with limited experience at the airport and in the Saab 2000.?
Accident investigation:
 |
|
Classification:
Wrong installation of parts Brake problem
Runway excursion (overrun)
Sources:
» KTUU» thecordovatimes.com
» ADN
» NTSB update
METAR Weather report:
00:56 UTC / 16:56 local time:PADU 180056Z 31011KT 10SM FEW034 BKN047 BKN060 07/01 A2950 RMK AO2 SLP995 T00720011
01:56 UTC / 17:56 local time:
PADU 180156Z 30021G27KT 5SM -RA BKN039 06/02 A2953 RMK AO2 PK WND 30027/0154 RAB41 SLP004 P0002 T00560017
02:56 UTC / 18:56 local time:
PADU 180256Z 25004KT 10SM BKN035 BKN044 BKN120 07/02 A2952 RMK AO2 RAE14 SLP002 ACSL NE P0002 60004 T00670017 53003
23:56 UTC / 14:56 local time:
PADU 172356Z 31006KT 10SM BKN036 BKN044 07/01 A2951 RMK AO2 RAB12E25 SLP999 P0000 60000 T00670011 10083 20056 53005
Photos
accident date: 17-10-2019
type: Saab 2000
registration: N686PA
accident date: 17-10-2019
type: Saab 2000
registration: N686PA
accident date: 17-10-2019
type: Saab 2000
registration: N686PA
accident date: 17-10-2019
type: Saab 2000
registration: N686PA
accident date: 17-10-2019
type: Saab 2000
registration: N686PA
accident date: 17-10-2019
type: Saab 2000
registration: N686PA
accident date: 17-10-2019
type: Saab 2000
registration: N686PA
accident date: 17-10-2019
type: Saab 2000
registration: N686PA
accident date: 17-10-2019
type: Saab 2000
registration: N686PA
Plot of FDR aircraft basic parameters during 2nd approach to DUT and landing
Plot of FDR parameters relating to aircraft deceleration during the touchdown and accident sequence
Flight track
N686PA
Video, social media
Aircraft history
| date | registration | operator | remarks |
|---|---|---|---|
| 9 April 1995 | SE-017 | Saab | first flight |
| 12 June 1995 | V7-9508 | Air Marshall Islands | |
| March 1998 | V7-9508 | Air Vanuatu | |
| 11 April 2000 | F-GJIG | Regional Airlines | |
| 22 June 2000 | LX-DBR | Europe Air Charter | |
| 29 Oct. 2001 | F-GOAJ | Air Jet | |
| 23 December 2004 | SE-017 | Saab | |
| 10 Apr 2005 | N519JG | Joe Gibbs Racing | registered |
| 10 May 2016 | N686PA | PenAir | registered |
Map
This map shows the airport of departure and the intended destination of the flight. The line between the airports does not display the exact flight path.
Distance from Anchorage-Ted Stevens International Airport, AK to Unalaska-Tom Madsen Airport, AK as the crow flies is 1261 km (788 miles).
Accident location: Approximate; accuracy within a few kilometers.
Distance from Anchorage-Ted Stevens International Airport, AK to Unalaska-Tom Madsen Airport, AK as the crow flies is 1261 km (788 miles).
Accident location: Approximate; accuracy within a few kilometers.
This information is not presented as the Flight Safety Foundation or the Aviation Safety Network’s opinion as to the cause of the accident. It is preliminary and is based on the facts as they are known at this time.
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