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July 13

FIXED WING

Beech 200 -  P & W PT6  - en route  - 01/05/2013 (201304786)

‘Door unlocked' caption illuminated during flight.  FRCs actioned and aircraft landed safely.  The door was checked and confirmed to be correctly secured, recycling the door failed to extinguish the caption. Investigation found that the door latch striker plate that operates the micro switch was missing.  Loose article checks were carried out and all items recovered. New parts on order for replacement.   

Beech 200 - P & W PT6 - Shoreham - 30/06/2013 (201307880)

Aircraft returned after Captain noticed during the initial climb the LH upper forward cowling coming loose.  ATC informed and a normal approach and landing made.  Investigation found that the latch bolt was some 40 deg from the locked position. The crew and engineer confirmed that all lock bars were aligned prior to departure. Reporter states that a previous similar condition was experienced just over a year ago. The lock mechanism was inspected and the lock action was correct.  Wear to the upper and lower cowl mating surfaces was noted and as a precaution, new stiffeners and doublers are being ordered for replacement.  Cowling reinstalled and aircraft released to service with no further re-occurrence.  

Beech 200 - P & W PT6 - En-route - 16/07/2013  (201309006)

Pilot noticed that the RH wing locker was unsecured and flapping in the airflow.  Aircraft returned with fire service in attendance. Visual inspection showed latches in the closed position.  (GASCo Comment: information on the cause would be welcome).  

Beech 200 - P & W PT6 - Honington - 16/07/2013 (201308843)

During scheduled maintenance the main door upper damper bracket was found to be distorted and cracked. Upon removal of the bracket, one mounting screw was found to be loose with stripped threads and another mounting screw had its broken head glued in position on the bracket. The bracket appeared to have been subjected to a heavy load causing it to crack and distort inwards towards the cabin, and causing the mounting screws to fail. An investigation is in progress to determine the exact cause and a warning placard will be designed to prevent this bracket from being used as an anchor/lashing point.  

Cessna 182 - Lycoming O-540 - Cambridge  - 01/05/2013  (201305148)

Pitch control forces felt normal during takeoff.  At level-off pitch control forces were felt to be moderately high. Pilot departed circuit to investigate and look for any possible interference.  Decision made to land. Investigations led engineers to believe that control forces became gradually stiffer as aircraft warmed in the sun and returned to normal when aircraft moved inside in cooler conditions.  On consulting with local manufacturers representative it was discovered that there was a Service Bulletin specifically designed to deal with this problem.  

Cessna 414 - Continental O-520 - Jersey - 14/07/2013 (201308586)

As landing gear was raised after take-off, violent vibration/short term pitching occurred.  Elevator appeared to be jammed but pull force of 250 lbs enabled level flight. Reduced power and extended flap to get nose-up pitching moment.  Slow climb to 200 ft with continual 200 lbs stick force required.  ATC advised of intention to return. Gear selected down and only two greens but after 5 mins RH gear locked.  On arrival engineers found elevator trim tab jammed in full nose-down and securing bolt between trim tab actuator and the aircraft control missing. Reporter adds that aircraft had recently returned from full overhaul and repaint.  (GASCo Comment: a difficult situation well handled by an obviously strong pilot.  It may be that it jammed during the pre-flight full-range check of the trim system).
 

Diamond DA42 - Austro E-4 AE300 - Teesside  - 13/05/2013 (201305463)

Rejected take-off due to engine power limitations. One engine was producing approx 40% power on full throttle. A download of the engine ECU showed a boost pressure problem. Data download copied to engine manufacturer. On investigation the control rod from the waste gate controller to the valve was found broken.  

Partenavia P68  - Lycoming IO-360 - En-route  - 19/07/2013 (201309174)

During en-route cruise, carbon monoxide fumes in flightdeck.  Flight crew had been complaining of headache from which he recovered and continued duty.  When power reduced for approach fumes became overpowering.  On landing it was noticed that the carbon monoxide indicator was black signifying danger.  Crew attended hospital as a precaution and were discharged later that same day.  Engineering inspection found that the engine exhaust muffler was cracked in the vicinity of the weld.  Air passing through the heat exchanger probably became contaminated with engine exhaust.  Records indicate that the muffler had been inspected as per requirements on 5 Jun 2013.  

Piper PA28  - Lycoming O-320 - Inverness - 05/07/2013 (201308042)

Aircraft had been parked for approximately 2 hrs following a training exercise.  Original reports indicated 'something' leaking from the aircraft.  On investigation ground staff discovered that there was smoke coming from the engine compartment/air intake.  Fire services called, by the time fire service arrived at the aircraft flames were seen from the engine area.  Once fire was extinguished the aircraft was towed to a remote area. It has been suggested by the pilot/instructor that the cause of the fire was possibly the starter motor.  

Piper PA28  - Lycoming O-360 - Fairoaks  - 25/06/2013 (201308387)

During annual inspection it was discovered that the aileron control cables were crossed. There was evidence of abrasion to the cables and pulleys. Control surface sense and range of movement were found to be correct. It is suspected that the rigging error had occurred during the last annual inspection.  All staff have been reminded of the need to ensure that the entire system integrity is maintained even if only one part has been disturbed. (GASCo Comment: a well-known piece of advice that needs to be borne in mind by all who work on aircraft).  

Piper PA28  - Lycoming O-360 - Unknown - 17/07/2013 (201309053)

During scheduled maintenance the RH wing walkway found cracked. Both front and rear skin panels had cracks around strengthening flutes on reinforcement pane.  (GASCo Comment: GASIL has regularly reported this problem area for 25 years or more!).


ROTARY WING 

Agusta A109  -  P & W PW200  - Denham  - 23/05/2013  (201307909)

During descent with no prior warning, the aircraft pitched violently upwards and three captions appeared on the electronic display unit (EDU); 'Pitch trim fail', 'Yaw trim fail' and 'Roll trim fail'.  Manual control was immediately established and the aircraft landed safely.  One further caption 'Mis-trim' appeared intermittently on the EDU on final approach.  Engineer's investigation found the collective trim motor out of tolerance.  Motor and collective lever balance spring replaced and friction adjustments carried out.  The aircraft's autopilot system has no faults reported but the flight control computer was also removed and replaced.  Systems tested and found serviceable i.a.w  AMM.  

Bell 412  -  P & W PT6  - Valley - 02/10/2012  (201212149)

During scheduled maintenance installation of a replacement, it was discovered that the hoist power cable was incorrectly fitted to aircraft connector.  On checking the connector it was found that it had been connected 180 deg out resulting in the polarity being reversed.  Refitted correctly.  

Eurocopter EC135 - Turbomeca Arrius - En-route - 19/05/2013 (201305679)

Simultaneous with a loud noise, the aircraft yawed to the right.  Aircraft flight path stabilised and investigated source of noise.  On checking it was found that the observer had broken the pedal cover due to the inadvertent application of force. This caused the yaw yoke to be pushed resulting in the aircraft yawing to the right. The noise was attributed to the cover breaking.



 

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