ASN Wikibase Occurrence # 312232
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| Date: | Friday 6 May 2022 |
| Time: | 09:13 UTC |
| Type: |  Boeing 737-8SA (WL) |
| Owner/operator: | Singapore Airlines |
| Registration: | 9V-MGL |
| MSN: | 44228/5531 |
| Year of manufacture: | 2015 |
| Fatalities: | Fatalities: 0 / Occupants: 173 |
| Aircraft damage: | Minor |
| Category: | Serious incident |
| Location: | Kathmandu-Tribhuvan Airport (KTM/VNKT) -
 Nepal
|
| Phase: | Take off |
| Nature: | Passenger - Scheduled |
| Departure airport: | Kathmandu-Tribhuvan Airport (KTM/VNKT) |
| Singapore-Changi International Airport (SIN/WSSS) | |
| Investigating agency: | TSIB Singapore |
| Confidence Rating: |  Accident investigation report completed and information captured |
Singapore Airlines flight SQ439, a Boeing 737-8SA, suffered a tailstrike on takeoff from runway 20 at Kathmandu-Tribhuvan Airport (KTM).
As the departure out of Kathmandu required the aircraft to fly over high terrain, the flight crew continued climbing to above the Minimum Safe Altitude (MSA) of 14,400 feet before descending and depressurising the aircraft as per the tail strike non-normal checklist and diverting to land in Kolkata, India.
After the aircraft landed in Kolkata, an inspection confirmed that the skid shoe of the aircraft’s tailskid assembly had contacted the runway in Kathmandu but there was no damage to the aircraft’s aft fuselage structure.
The tail strike occurred during the take-off at KTM airport was due to overrotation by the PF, coupled with a likely tailwind with a component of about 10 knots along the runway. The rotation pitch rate was, at times, greater than 5° per second as recorded by the FDR. The pitch angle of 11.07° recorded also exceeded the 7° – 9° normal pitch angle range.
Accident investigation:
 |
|
Sources:
TSIB
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 08-May-2023 08:47 | harro | Added |
| 08-May-2023 08:49 | harro | Updated |
Corrections or additions? ... Edit this accident description
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