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| Date: | Saturday 9 October 2021 |
| Time: | 07:56 |
| Type: |  Boeing 767-36NER |
| Owner/operator: | EuroAtlantic Airways, opf STP Airways |
| Registration: | CS-TKR |
| MSN: | 30854/844 |
| Year of manufacture: | 2001 |
| Total airframe hrs: | 69952 hours |
| Cycles: | 12919 flights |
| Engine model: | GE CF6-80C2B7F |
| Fatalities: | Fatalities: 0 / Occupants: 236 |
| Other fatalities: | 0 |
| Aircraft damage: | None |
| Category: | Serious incident |
| Location: | São Tomé Island Airport (TMS/FPST) -
 São Tomé and Príncipe
|
| Phase: | Take off |
| Nature: | Passenger - Scheduled |
| Departure airport: | São Tomé Island Airport (TMS/FPST) |
| Lisboa-Humberto Delgado Airport (LIS/LPPT) | |
| Investigating agency: | CNIPAIA |
| Confidence Rating: |  Accident investigation report completed and information captured |
The aircraft took off from São Tomé International Airport (FPST) for a flight to Humberto Delgado Airport (LPPT) in Portugal.
During take-off run, after the V1 (126kt) and just before the rotation speed when passing through 136kt, the engine #2 had a sudden and rapid thrust reduction and drop in all the parameters and the crew decided to in-flight shutdown engine according per check list procedures. Landing at São Tomé International Airport was carried out after expending fuel to reach the landing limit weight.
The investigation concluded that the power loss of the engine #2 was due to HMU failure.
CAUSAL FACTORS
The cause of the engine power loss was failure of the HMU.
CONTRIBUTORY FACTORS
AFSO solenoid grommet raised and out of position, which led to insufficient fuel flow.
Escaping pressure on P2P tube connected to the Over Speed Bracket Assembly adversely affected the Head Sensor Assembly causing excessive Bypass valve opening and associated drop in fuel flow.
Ground wires for the Resolvers were backed out from their normal installed position in the connector.
Accident investigation:
 |
|
Sources:
GPIAAF
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 05-Oct-2022 09:33 | harro | Added |
| 06-Jul-2024 07:11 | ASN | Updated [Narrative, Accident report, ] |
| 06-Jul-2024 07:16 | ASN | Updated |
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