ASN Wikibase Occurrence # 190886
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| Date: | Sunday 18 November 2001 |
| Time: | 17:45 |
| Type: |  Boeing 777-212ER |
| Owner/operator: | Singapore Airlines |
| Registration: | 9V-SRE |
| MSN: | 28523/239 |
| Year of manufacture: | 1999 |
| Fatalities: | Fatalities: 0 / Occupants: |
| Aircraft damage: | None |
| Category: | Incident |
| Location: | Tindal, NT -
 Australia
|
| Phase: | En route |
| Nature: | Passenger - Scheduled |
| Departure airport: | Brisbane International Airport, QLD (BNE/YBBN) |
| Singapore-Changi International Airport (SIN/WSSS) | |
| Investigating agency: | ATSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
After departing Brisbane en-route to Singapore, the crew of the Boeing 777-212ER aircraft heard and felt two thumps through the airframe and noticed a severe vibration indication of the right engine. The vibration subsided before re-occurring moments later with an increase in the engine's exhaust gas temperature also indicated. The crew conducted an in-flight engine shutdown and requested Air Traffic Control clearance to divert to Darwin where an uneventful single-engine landing was carried out.
An inspection conducted by ground engineers at Darwin found a stage-1, variable stator vane (VSV) control lever broken on the right engine. A boroscope inspection of the engine interior was then carried out with a number of compressor blades found damaged.
Significant factors:
1. A number of IPC stage-2 blades were found to be damaged during a boroscope inspection on 8 April 2001 but remained in service on the engine.
2. Fatigue cracking of the VSV-1 lever led to its failure resulting in the closing of the number-28 Variable Stator Vane.
3. The closure of the number-28 Variable Stator Vane created a disrupted airflow, which acted on the passing blades.
Sources:
https://www.atsb.gov.au/publications/investigation_reports/2001/aair/aair200105494
Revision history:
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