PIA AT42 at Karachi on Jun 9th 2017, engine shut down in flight

Last Update: June 15, 2019 / 21:50:18 GMT/Zulu time

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Incident Facts

Date of incident
Jun 9, 2017

Classification
Incident

Flight number
PK-311

Aircraft Registration
AP-BHM

Aircraft Type
ATR ATR-42

ICAO Type Designator
AT42

A PIA Pakistan International Airlines Avions de Transport Regional ATR-42-500, registration AP-BHM performing flight PK-311 from Quetta to Karachi (Pakistan) with 41 passengers and 4 crew, was on final approach to Karachi's runway 25L when the crew needed to shut the left hand engine (PW127) down. The crew continued the approach maintaining routine communication for a safe landing on runway 25L and still maintaining routine communication vacated the runway and taxied to the apron.

On Jun 22nd 2017 Pakistan's AIB reported the occurrence was rated a serious incident and is being investigated by Pakistan's AIB. While the aircraft was on final approach to runway 25L the crew shut the #1 engine down and "landed from the same approach" and vacated the runway safely.

On Jun 15th 2019 Pakistan's AIB released their final report concluding the probable cause of the serious incident was:

The occurrence was caused due to failure of No 30 Bearing of the engine however the exact cause of No 30 Bearing failure couldn’t be established due to excessive damage.

The AIB reported the first officer noticed a flight asymmetry in the flight conditions while on final ILS approach to Karachi, the captain took control of the aircraft. A Master Caution along with an EEC and subsequent PEC light for the left hand engine occurred. The crew shut the left hand engine down and continued for a safe landing.

A postflight inspection revealed the magnetic chip detector was covered with metallic particles, abnormal sounds were heard from accessory gear box and irregular movement of the accessory gear box was noticed. The engine was removed and sent to the manufacturer for a tear down examination. The AIB wrote: "During tear down examination of the engine, it was established that the event was a result of failure of No. 30 bearing which is installed on tower shaft of Accessory Gear Box (AGB). Owing to this failure, drive from the engine was lost which lead to IFSD due stopping of all driven components (Oil & Fuel Pumps etc)."
Incident Facts

Date of incident
Jun 9, 2017

Classification
Incident

Flight number
PK-311

Aircraft Registration
AP-BHM

Aircraft Type
ATR ATR-42

ICAO Type Designator
AT42

This article is published under license from Avherald.com. © of text by Avherald.com.
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