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| Date: | Wednesday 3 May 2006 |
| Time: | 07:35 |
| Type: |  Boeing 737-86N (WL) |
| Owner/operator: | Pegasus Airlines |
| Registration: | TC-AAP |
| MSN: | 32736/1113 |
| Year of manufacture: | 2002 |
| Engine model: | CFMI CFM56-7B |
| Fatalities: | Fatalities: 0 / Occupants: 194 |
| Other fatalities: | 0 |
| Aircraft damage: | None |
| Category: | Incident |
| Location: | Skellefteå Airport (SFT/ESNS) -
 Sweden
|
| Phase: | Taxi |
| Nature: | Passenger - Non-Scheduled/charter/Air Taxi |
| Departure airport: | Skellefteå Airport (SFT/ESNS) |
| Antalya Airport (AYT/LTAI) | |
| Investigating agency: | SHK |
| Confidence Rating: |  Accident investigation report completed and information captured |
The aircraft was to undertake a charter flight from Skellefteå in Sweden to Istanbul/Antalya in Turkey with the commander as PF (Pilot Flying).
Taxying took the form of a backtrack on the runway for take-off from runway 10.
When the aircraft reached the end of the runway the commander performed a 180 degrees left turn to align the aircraft with the runway. Engine power was increased, according to the commander, first manually to
about 40% power on both engines before the automatic throttle system (ATS) was activated and the brakes were released. At this point the pilots perceived that the aircraft, in an uncontrolled manner, began to move and turned to the left, and the commander did not succeed in preventing it from departing from the runway despite the use of
both nosewheel steering and brakes. In connection with the uncontrolled movement of the aircraft the pilots heard an unusual and “buzzing” noise from the nose of the aircraft. No-one on board was injured and the aircraft
showed no visible signs of damage.
No technical fault has been found in the aircraft. The weather and runway condition were good. When ATS was activated for take-off the engine power was asymmetrical and the aircraft was not lined up on the runway. The buzzing sound heard by the pilots seems, together with nosewheel marks on the runway and tyre wear on the nosewheel to have been caused by the nosewheel skidding.
The pilots did not manage to restrain the leftwards turning by using only the nosewheel steering. Braking with the wheel brakes was performed late and with low brake pressure.
The incident was caused by the ATS being activated before the aircraft had been lined up on the runway and while the engine power was asymmetrical. A contributory factor was that the pilots did not correct the engine power in time, that the wheel brakes were applied too late and with too low brake pressure.
Accident investigation:
 |
|
Sources:
https://www.shk.se/download/18.2d6f089b18faca29dc81cef4/1699873173021/rl2007_03e.pdf
https://www.airfleets.net/ficheapp/plane-b737ng-32736.htm
History of this aircraft
Other occurrences involving this aircraft
| 4 July 2023 | TC-JKY | Turkish Airlines, opb Anadolu Jet | 0 | Ercan Airport |  |
unk |
| Engine failure | ||||||
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 02-Nov-2024 07:43 | Justanormalperson | Added |
| 02-Nov-2024 07:45 | ASN | Updated [Narrative, Accident report, ] |
Corrections or additions? ... Edit this accident description
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