21 April – 20 May 2019

412
PRATT AND WHITNEY PW123 E – ATA 7200 ENGINE (TURBINE/TURBOPROP) – TURBINE ENGINE – POWER LOSS. DR 611953589
Immediately after take-off, No 1 engine started making a popping sound and power (torque) reduced to 58%. Power fluctuation of 10 to 15% caused the aircraft to yaw left and right. Through 800 ft, no. 2 Engine torque reduced to approx. 68%. The popping sound returned on No.1 engine when power was reduced. Aircraft landed without further incident.
GENERAL ELECTRIC CT7 2E1 – ATA 7200 ENGINE (TURBINE/TURBOPROP) – EECU – FAULT MESSAGE. DR 611953596
#2 EECU CAS warning illuminated. Warning disappeared on shut down. Could not replicate fault.
After shutdown, fault log reviewed, code 72-00193 revealed. This fault code indicates a fault in EEC2 anti ice system channel A. Green cable connector plug at AISBV was checked and found tight. Under observation.
CFM CFM56 7B 26 – ATA 7830 THRUST REVERSER – THRUST REVERSER – FAILED TO DEPLOY. DR 611953606
Flight crew reported on landing, engine 1 thrust reverser failed to deploy, thrust lever would not go past interlock. Event is considered an intermittent fault.

FIM 78-34 task 803 carried out, unable to reproduce fault. Nil EAU (engine accessory unit), EEC faults, interlock test ok.

One similar defect reported

IAE V2527 A5 – ATA 7530 COMPRESSOR BLEED CONTROL – VANE – FAULT MESSAGE. DR 611953625
ATB due compressor vane fault, IAW TSM, engine ground runs carried out on bay. Aircraft returned to service. Nil faults evident.
GENERAL ELECTRIC CT7 9B – ATA 7200 ENGINE (TURBINE/TURBOPROP) – TURBINE ENGINE – IFSD. DR 611953631
Crew experienced an uncommanded operation of the left engine whilst on descent. Engine torque fluctuations of ±15% noted at 60% engine torque, then ±5% torque fluctuations at 25% engine torque setting. Left engine shut down following uncommanded engine operation checklist.
LYCOMING LF507 1F – ATA 7200 ENGINE (TURBINE/TURBOPROP) – TURBINE ENGINE – IFSD. DR 611953658
In flight, #2 Engine had high vibrations and EGT reading of 750°. Engine was shut down in flight. Aircraft diverted to alternate. Post flight inspection revealed major internal failure.
PRATT AND WHITNEY PW150 A – ATA 7321 FUEL CONTROL/TURBINE ENGINES   – FMU – Fuel leak. DR 611953661
During routine maintenance, FMU looked wet. Leak was observed as soon as the engine was motored low NH.
FMU was replaced, sent for repair and strip report has been requested.
ROLLS ROYCE RB211 524 G2 – ATA 7200 ENGINE (TURBINE/TURBOPROP) – TURBINE ENGINE – IFSD. DR 611953663
At cruise step climb, #2 engine vibration, followed by over temp. Engine oil went to zero. On bay engine inspected and last stage of LPT blades broken off. Oil pipe to pressure transmitter found sheared off. Parts of the blades damaged L/H mid aileron.

Investigations are continuing.

IAE V2527 A5 – ATA 7321 FUEL CONTROL/TURBINE ENGINES – FMU – Fuel leak. DR 611953681
During scheduled inspection, FMU on the LH Engine was reported to have a static fuel leak. A non-routine task was raised to remove and replace FMU.

Static leak from the FMU is a known issue. IAE and Woodward are working on a solution, targeted for release in Q4 2019.

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