20th February – 20 March 2019

373

SAAB 340 B – ATA 7603 POWER LEVER – CONDITION LEVER – Detached. DR 611953345
LH condition lever snapped off during unfeathering. Control quadrant being replaced.

AIRBUS A320 232 – ATA 7120 ENGINE MOUNT SECTION – PIN – MIGRATED. DR 611953354
During routine maintenance, it was noticed that the aft engine mount inner pins were not retained, Retainers were not attached at one end which allowed the inner pins to migrate out. 

The fasteners used to secure the retainers were installed on the loose end of the retainer, which indicates the retainers were not refitted after maintenance. Refer PPBU Manual 71-00-02-400-022. Fleet wide inspection launched to ensure engine mount integrity.

DE HAVILLAND DHC8 102 – ATA 3411 PITOT/STATIC SYSTEM – STATIC PORT – BLOCKED. DR 611953357
Evidence of insect activity in the static lines. Static lines were blown through, pitot static checks carried out, system was deemed serviceable.

DE HAVILLAND DHC8 314 – ATA 3411 PITOT/STATIC SYSTEM – STATIC PORT – BLOCKED. DR 611953359
After rotation, lost IAS, R/H side ALT, AFCS and yaw damper. Suspected insect activity. Static lines were blown through, pitot static checks carried out, system was deemed serviceable.

DE HAVILLAND DHC8 402 – ATA 3222 NOSE/TAIL LANDING GEAR STRUT/AXLE – Schrader valve – LEAKING. DR 611953374
On take-off, LG was selected up. Landing gear failed to retract showing 3 red lights, at approximately 400ft “Weight on Wheels” caution light also illuminated. ATB to base initiated. 

Maintenance troubleshooting carried out. NLG shock strut pressure found low. Suspect leaking Schrader valve. Valve replaced, NLG shock strut extension check carried out IAW AMM 12-10-32.

SAAB 340 B – ATA 2611 SMOKE DETECTION SYSTEM – SMOKE DETECTOR – FAULTY. DR 611953381
Lavatory smoke warning indication illuminating sporadically in flight, together with warning self-extinguishes after several seconds. Faulty lavatory smoke detector.

Smoke detector found to be slow in response. Monitored for 5 minutes and unable to fault it. However, smoke detector replaced due nature of the defect.

AIRBUS A320 232 – ATA 2910 HYDRAULIC SYSTEM, MAIN – PUMP – OVERHEATED. DR 611953382
Crew observed HYD B ELEC PUMP OVHT during cruise, followed ECAM actions and selected pump to OFF.
Engineers found pump running very hot and tripping the CB. Pump replaced.

DR 611953386
DR 611953386
DR 611953386

DE HAVILLAND DHC8 314 – ATA 3610 PNEUMATIC DISTRIBUTION SYSTEM – DUCT – LEAKING. DR 611953386 (images above)
During gust lock operation, it was noted that the gust locks were difficult to operate. Engineers investigated the gust lock cables and found 2 centre fairleads had melted around the cables.

Upon further investigation, it was discovered that a bleed duct had been leaking due to several cracks. Ducts and fairleads have been replaced.

DE HAVILLAND DHC8 202 – ATA 2130 PRESSURE CONTROL SYSTEM – CABIN – DEPRESSURISATION. DR 611953412
In cruise at 24000′ at 74.4% Tq setting, cabin altitude started to rise, first observed at 8,400′ at differential of 5 psi. Descent commenced at flt idle, cabin rate responded by descending the cabin as per normal.

Moreover, “Air cond pack Hot” illuminated for approx. 20 seconds on descent from 25,000 ft at low power settings with ice protection Auto airframe selected to fast.
Engineering currently troubleshooting.

BOEING 737 783 – ATA 2130 PRESSURE CONTROL SYSTEM – AIRCONDITIONING – ERRATIC. DR 611953405
During cruise at 40000 ft, cabin altitude started to vary erratically. Against selected differential pressure of 8.2 psi, cabin alt varied between 8500 ft and 7500 ft.

Extensive troubleshooting carried out, along with cabin pressure operated up to max normal diff press of 8.35 psi. Nothing abnormal observed, small fluctuations in cabin climb indicator as expected. Duct split record sheet recorded, nil anomalies.

Suspecting indication problem. As a precaution, both LH and RH pack flow sensor replaced IAW AMM task 21-51-43-400-XX.

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