SDR 510023615 | Schweizer 269C1 Main rotor blades—retaining ring cracked. During inspection, rotor blade droop stop ring found cracked. P/No: 269A1329. TSN: 2362 hours.
SDR 510023579 | Diamond DA42 Landing gear door actuator—actuator broken. L/H MLG actuator broken at MLG attachment. Pilot reported an inflight gear unsafe flight. P/No: X110061. TSN: 5039 hours.
SDR 510023576 | McCauley 1A170E Propeller blade section—propeller fractured. Propeller received in shop with number 2 tip damaged.
SDR 510023570 | Airbus A321-231 APU start/ignition system—starter motor welded. After landing at destination, APU failed to start after 2 attempts. The APU last leg report faulted the APU starter motor (8KA) and MEL 49-10XX was applied. Carried out TSM 49-00-XX, identified an open circuit in the starter motor. On inspection the starter terminals were found welded to the starter motor due to arcing. MEL remains in place pending wire and starter motor replacement. P/No: 27045062.
SDR 510023570 | Airbus A321-231 APU start/ignition system—starter motor welded. After landing at destination, APU failed to start after 2 attempts. The APU last leg report faulted the APU starter motor (8KA) and MEL 49-10XX was applied. Carried out TSM 49-00-XX, identified an open circuit in the starter motor. On inspection the starter terminals were found welded to the starter motor due to arcing. MEL remains in place pending wire and starter motor replacement. P/No: 27045062.
SDR 510023570 | Airbus A321-231 APU start/ignition system—starter motor welded. After landing at destination, APU failed to start after 2 attempts. The APU last leg report faulted the APU starter motor (8KA) and MEL 49-10XX was applied. Carried out TSM 49-00-XX, identified an open circuit in the starter motor. On inspection the starter terminals were found welded to the starter motor due to arcing. MEL remains in place pending wire and starter motor replacement. P/No: 27045062.
SDR 510023556 | Lycoming IO540E1B5 Magneto/distributor—bushing worn. Minor oil leak defect reported. Removal of the Magneto to replace oil seal found the bearing bush had dislodged and excessively worn the crankcase mount. Engine replaced. The bush is replaced at crankcase overhaul. It is machined to size required to mount the magneto drive bearing. The bush is locked into place by three peened marks. The crankcase overhaul workshop has been contacted. Awaiting engine to be stripped for further investigation. P/No: NA. TSO: 1166 hours.
SDR 510023552 | Continental IO240B Reciprocating engine internal oil system—gear unserviceable. Pilot reported low oil pressure. Upon inspection of the oil system, a small metallic piece was found stuck on oil pressure relief valve seat. Subsequent inspection of the rear accessories housing found crank shaft cluster and starter gear had signs of damaged teeth. OEM SB14-2 was carried out and starter/cluster gear modified to chamfered cut gears IAW the SB. P/No: 656762. TSN: 796 hours.
SDR 510023551 | Rolls Royce TRENT97284 Compressor bleed valve —bleed valve broken. During inspection of #4 engine HPT blades, upper right hand bleed valve found with outlet duct failed. P/No: 32250907.
SDR 510023546 | Unknown ignition harness (distribution)—ignition lead burnt. Ignition lead failed insulation test. Inspection found severe damage due ignition insulation breakdown causing arcing. The number of similar ignition lead failures has increased recently. Investigation reveals the lead manufacturer has changed the material and it is believed that this is the cause of the ignition leads failing. Manufacturer advised. Ignition lead repaired P/No: 1040040178. TSN: 1375 hours.
SDR 510023517 | Cessna 150L Aileron control system—turnbuckle fractured. During SID inspections, cable end fractured at turnbuckle in RH aileron channel. Inspections followed after loss in motion was reported in aileron controls. Turnbuckle/cable assemble saved by lockwire preventing separation of cable and loss of control. Cable removed and all control cables replaced. No indication when part failed with cable appeared to be back to birth installation. P/No: 040010741. TSN: 3089 hours.
SDR 510023511 | Swearingen SA227TT Wing spar—strap corroded. During scheduled inspection of the wing main spar centre webs for cracks between LH WS 27 and RH WS 27 in the area where the spar passes through the lower fuselage, moderate corrosion was found on the main spar forward and aft upper spar cap steel reinforcement straps between fuselage stringers 13L and 13R. Access to the affected area is extremely restricted with estimates that the worst area of corrosion may be up to 0.040 inch deep and several areas up to 8 inches in length found. P/No: 2731160003.
SDR 510023485 | Beech 300 Air distribution system—bypass valve contaminated. Suspect strontium chromate residue found inside the right hand bleed air bypass valve. Screw missing from right hand bleed air bypass valve plate. The strontium chromate residue observed within the duct housing is likely to have originated from degradation of the corrosion protection coating applied to the inner surface of the valve duct housing. The missing screw was possibly due to insufficient locking on the attachment screw allowing the screw to work loose and detach from the plate and shaft. To rule out fleet wise contamination, fleet wise inspection has initiated. P/No: 10155008725. TSN: 7396 hours/6473 cycles.
SDR 510023482 | Messier-Hispano ATR72 wheel cracked. During workshop inspections, a minor crack indication was found on the mating face of outer wheel half, on the outer edge of the tie bolt hole bore. Dye Penetrant Inspection per CMM rev latest was completed in the immediate area to confirm the indication. The length of the crack was approximately 0.165 inches. The crack had not extended into the tie bolt hole bore. No sign of damage to the wheel rim was detected. Nil defects on the inboard hub were identified. To avoid fatigue cracking from corrosion pits that emanate while fretting between the wheel halves compromising the surface finish, Repair facility had been stripping both wheel half mating faces entirely of all primer back to the bare metal, then alodining and re-priming these surfaces. P/No: A365593. TSN: 4332 hours TSO: 3562 hours.
SDR 510023448 | Bell 206B Main rotor gearbox—gear unserviceable. Overhauled part received with ARC. However It was noted that part was out side minimum limits as per the Bell 206 B3 CR&O. P/No: 206040122103SNAFS5152.
SDR 510023423 | Boeing 737-838 AC inverter—inverter failed. During end of heavy maintenance check, after power being connected to the airplane for some time, heavy smoke and burning smell was noticed that was traced to burned static inverter with associated CB tripped on P6 panel. Inverter was inspected at the repair facility and was declared beyond economical repair. Inverter was found with burnt Flyback power stage. Failure mode remains unknown and no recommendations at this stage. P/No: 100201022090.
SDR 510023408 | Eurocopter AS350B3 Main rotor system—scissor arm worn. At regular inspection, bush and spacers contained in rotating and non rotating scissors are found to have unacceptable amount of wear, in some cases this can occur in under 20hrs of flight time. P/No: 350A37112602. TSN: 148 hours.
SDR 510023392 | Eastern Aero Marine KSE35L8LIFEJACKET light fitting unserviceable. During scheduled 5 year maintenance, large number of unserviceable light assembly powering batteries were recovered from a batch of passenger life jackets. Batteries were reportedly swollen beyond CMM limits. The Unserviceable Battery may lead to the Life Jacket Lighting system not illuminating in the event of use, once water immersed. Part number (battery Orange) in question has poor reliability and this had been reported to CASA in the past. Previous battery failures were dealt under warranty replacement. P/No: PN51709.
SDR 510023363 | Diamond DA42 Trailing edge flap actuator—bellcrank broken. Flap bell crank upper arm broken at flap actuator attachment. Last installation verified IAW AMM with spacer and actuator eye end orientation. This arrangement, did not work and fatigue failure occurred. OEM confirmed correct spacer orientation with fleet wise inspections done to validate this. This leading to conclusion of incorrect AMM assembly instruction. P/No: D6027571100. TSN: 4677 hours.
SDR 510023363 | Diamond DA42 Trailing edge flap actuator—bellcrank broken. Flap bell crank upper arm broken at flap actuator attachment. Last installation verified IAW AMM with spacer and actuator eye end orientation. This arrangement, did not work and fatigue failure occurred. OEM confirmed correct spacer orientation with fleet wise inspections done to validate this. This leading to conclusion of incorrect AMM assembly instruction. P/No: D6027571100. TSN: 4677 hours.
SDR 510023360 | Lycoming T5313B Turbine engine compressor section—impeller damaged. Loose Dzus fasteners ingested into air intake causing damage to compressor blades. Apparently fasteners were incorrectly installed. Repair instructions requested from the OEM. P/No: 110007813. TSO: 164 hours.
SDR 510023334 | Beech 300 Exterior lighting—light fitting damaged. LH wing tip strobe/ navigation light assembly got damaged during towing. Apparent reason understood was non application of parking brake after the tow bar attachment sheared. P/No: 1307003245. TSN: /1860 cycles/862 landings.
SDR 510023330 | Gulfstream 500S Wing miscellaneous structure—strap cracked. During accomplishment of AD AC 093 & SSB:223 PART 1 inspection, R/H lower strap was found cracked from lower side of Hi-lock fastener and confirmed by NDT. Upon removal of strap, strap was broken into two pieces, upper crack went undetected. As per SB:223 PART 2, inspection was carried out and L/H wing to fuselage bracket, was found cracked from inboard forward radius upper and lower and confirmed by NDT. No further defects were found by visual or NDT inspections. SB: 223 PART 3 inspection was carried out and L/H frame at FS 100.0 was found cracked under tee bracket in two positions. These cracks were confirmed by NDT with no further defects found on left or right frames. All repairs done in an approved manner using Part 21 design approvals and approved data. P/No: 1700368.
SDR 510023328 | Agusta Bell 412 Engine/transmission coupling—transmission broken. During an engine change, transmission to mast attachment stud was found broken. Under guidance from the Type Certificate holder, broken stud was removed, NDT inspection carried out on the Transmission top case. All Transmission to mast attachment studs were replaced with no further defect identified. All work was carried out IAW AB412 approved manuals. P/No: 412040002109. TSN: 10402 hours TSO: 4357 hours.
SDR 510023324 | Bell 412 Hydraulic system main—pipe cracked and leaking. Hydraulic leak coupled with zero hydraulic pressure reported on the ground between circuits from system no1. Airplane shut down and towed for maintenance. Leak was traced to a cracked pipe that was replaced. P/No: 212076433001.
SDR 510023318 | Airbus A320-232 VHF communication system—antenna corroded. While undergoing heavy maintenance, VHF antenna was removed corroded. While removing antenna, co axial cable was also noted to be cut. No apparent cause of cable cut was established however cable connector will be replaced during the grounding. P/No: 240389.
SDR 510023303 | Cessna 172R Wing plates/skin—rivet worn. Suspect worn rivets, paint stripped on registration area at LH wing lower surface between WS 100.50 – WS208. Rivets found worn up to 50% of head profile including 75% of rivets in area. Suspect 6 total aircrafts affected, paint still need to be stripped. P/No: MS20470AD4AND3. TSN: 8393 hours.
