21 September-20 October 2019

75
ROTORCRAFT
AGUSTA AW139 – ATA 3140 CENTRAL COMPUTERS (EICAS)  – POWER SUPPLY – UNSERVICEABLE. DR 611954268
In flight, Primary Flight Display (PFD) degraded with a MAU#2 Amber Caution indicated.

Root cause:  Failure of the MAU#2 power supply.

Serviceable MAU power supply fitted; functional checks completed.

 
AGUSTA AW189 – ATA 3000 ICE/RAIN PROTECTION SYSTEM – ANTI ICE VALVE – FAULT MESSAGE. DR 611954278
#1 EECU Maint CAS Message presented regarding Anti Icing Start valve cable. Connectors cleaned.
 
AGUSTA AW139 – ATA 2930 HYDRAULIC INDICATING SYSTEM  – PRESSURE SWITCH – SHORT CIRCUIT. DR 611954279
Just after take-off, on climb # 2 SERVO caution illuminated. Aircraft was returned to departing base. Wiring continuity and insulation check carried out on Servo pressure switch. Suspected closed circuit found between Pin A and Earth with no Hydraulic pressure applied.

Pressure Switch replaced with serviceable item IAW AMP-39-A-67-31-01-01A-921A-A, Functional check carried out, nil defect evident.

AGUSTA AW189 – ATA 3260 LANDING GEAR POSITION AND WARNING SYSTEM  – HARNESS – DAMAGED. DR 611954324
The 1-2EECU MAINT caution illuminated followed by 1 WOW FAIL.

Aircraft returned to base and damaged wiring harness discovered.

Damaged harness replaced, aircraft returned to service.

 

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