N41UE

Part: WIRE — CORRODED (DOWNLOCK SWITCH)

AT LANDING IN ANCHORAGE, THE GEAR UNSAFE LIGHT CAME ON AT LANDING FLARE. THE GREEN SAFE LIGHT REMAINED ON. THE LANDING WAS COMPLETED WITHOUT INCIDENT. MAINTENANCE REPAIRED BROKEN/CORRODED WIRES AT THE NOSE GEAR DOWN SWITCH BY REPLACING THE SWITCH. (M)

Part: SWITCH — FAILED (ACTUATOR)

ON APPROACH TO LANDING, NOSE GEAR GREEN LIGHT DIDN`T COME ON WITH GEAR HANDLE SELECTED DOWN. MAINTENANCE COULD NOT DUPLICATE THE DISCREPANCY ON THE GROUND. THE NOSE GEAR UP AND DOWNLOCK SWITCH AND CONNECTOR WERE REPLACED AND AN OPERATIONAL CHECK FLIGHT WAS PERFORMED. THE CHECK FLIGHT WAS UN-SATISFACTORY DUE FAILURE OF THE NOSE DOWN AND LOCK INDICATOR FAULT. REPLACED NOSE GEAR ACTUATOR.

Part: PIN — CORRODED (NLG CONNECTOR)

ON APPROACH TO LANDING, NOSE GEAR GREEN LIGHT DID NOT COME ON UNTIL GEAR WAS CYCLED. MAINTENANCE COULD NOT DUPLICATE THE DISCREPANCY ON THE GROUND AND TROUBLE SHOT TO A CORRODED CONNECTOR PIN IN THE UP/DOWN LOCK SWITCH CIRCUIT.

Part: INDICATOR — ERRATIC (COCKPIT)

ON TAKE OFF RUN, PILOT OBSERVED HIGH (920 DEG). ITT INDICATION ON NR1 ENGINE AND ABORTED THE TAKE OFF. MAINTENANCE REPLACE THE NR1 ITT INDICATOR DUE ERRONEOUS INDICATION AT THE HIGH END OF THE SCALE.

Part: GAUGE — SHORTED (COCKPIT)

SMELL OF SMOKE, PULLED RIGHT FUEL GAUGE CIRCUIT BREAKER, SMELL WENT AWAY. VERIFIED SMOKE WAS FROM RIGHT FUEL GAUGE, PULLED AND BANDED RIGHT FUEL GAUGE CIRCUIT BREAKER. RIGHT FUEL QUANTITY GAUGE PREVIOUSLY DEFERRED.

Part: STOP PIN — LOOSE (POWER LEVER)

PIN TO ARM WELD JOINT FAILED AND ALLOWED PIN TO MOVE/FALL OUT OF ARM (STOP PIN REPLACED BY FLEET SUPPORT SERVICES AT PREVIOUS REPAIR). WITH PIN OUT OF LOCATION, POWER LEVER REVERSE WHILE IN FLIGHT. THIS HAS BEEN A CONTINUING PROBLEM WITH FLEET REPAIRED UNITS AND WE HAVE STOPPED USING REPAIRED POWER LEVERS DUE TO CONTINUAL FAILURE OF THIS PIN ATTACHMENT.

Part: SWITCH — DISCONNECTED (EXTINGUISHER)

FOUND SQUIB POWER SWITCH DISLOCATED FROM MAIN ENG FIRE EXTING ANNUNCIATOR/ACTUATOR ASSY. SQUIB SWITCH MODULE NOT PROPERLY RETAINED BY TABS ON ANNUNCIATOR BODY. THIS CONDITION WAS FOUND ON TWO ASSEMBLIES OUT OF SIX CHECKED. NEW REPLACEMENT ASSY FOUND TO BE MARGINALLY BETTER FOR RETENTION OF SQUIB SWITCH MODULE ON AFT END OF ANNUNCIATOR/ ACTUATOR ASSY. SUGGEST A CHANGE IN DESIGN OF ASSY FOR POSITIVE ATTACHMENT OF SQUIB POWER SWITCH. NOTE: THE CONDITION FOUND ON THE TWO ASSY WOULD PREVENT THE FLT CREW FROM BEING ABLE TO DISCHARGE THE AFFECTED ENGINE FIRE BOTTLES AT ANYTIME. ALSO, THERE IS NO WAY FOR THE CREW TO PREFLIGHT THIS SYSTEM TO VERIFY THAT THE FIRE BOTTLE SQUIBS COULD BE BLOWN IF NEEDED.

Part: SWITCH — DISCONNECTED (FIRE EXT)

WHILE PERFORMING 'NEW INSP REQUIREMENT, FOUND SQUIB POWER SWITCH DISLOCATED FROM MAIN ENG FIRE EXTINGUISHER ANNUNCIATOR/ACTUATOR ASSY. FOUND SQUIB SWITCH MODULE NOT PROPERLY RETAINED BY TABS ON ANNUNCIATOR BODY. THIS CONDITION WAS FOUND ON 2 ASSYS OUT OF 6 CHECKED. NEW REPLACEMENT ASSY FOUND ONLY MARGINALLY BETTER FOR RETENTION OF SQUIB SWITCH MODULE ON AFT END OF ANNUNCIATOR/ACTUATOR ASSY. SUGGEST A CHANGE IN DESIGN OF THE ASSY FOR POSITIVE ATTACHMENT OF SQUIB POWER SWITCH. NOTE: CONDITION FOUND ON THE TWO ASSYS WOULD PREVENT FLT CREW FROM BEING ABLE TO DISCHARGE AFFECTED ENG FIRE BOTTLES AT ANYTIME. ALSO, THERE IS NO WAY FOR CREW TO PRE-FLIGHT SYS TO VERIFY FIRE BOTTLE SQUIBS WOULD BE BLOWN IF NEEDED.

Part: LIGHT — FAILED (SWITCH)

'GPS' MODE LIGHT OUT AFTER 726 HOURS/70 DAYS OF OPERATION.

Part: SKIN — CRACKED (FUSELAGE)

ON ROUTINE INSPECTION, FOUND A .5 INCH CRACK IN FUSELAGE SKIN AT FUSELAGE STATION 544.25, WATER LINE 113.00. THIS LOCATION HAS A BULKHEAD AND STRINGER JOINT LOCATED BEHIND IT. THE BULKHEAD FLANGE WAS ALSO CRACKED AT THIS LOCATION. NO CAUSE FOR THE CRACK COULD BE DETERMINED FROM A VISUAL INSPECTION. ALL DAMAGE WAS REPAIRED IAW THE BEECH STRUCTURAL REPAIR MANUAL. (M)

Part: HOUSING — ERODED (SCAV PUMP)

ON PREFLIGHT INSPECTION, NOTICED OIL LEAKING FROM NR 2 ENGINE. FOUND PIN HOLE IN ENGINE SCAVENGE PUMP HOUSING. TEAR DOWN INSPECTION REVEALED DEEP CAVITATION WEAR THAT HAD PERFORMED THE PUMP BODY WALL. THIS PUMP HOUSING WAS IN COMPLIANCE WITH PWA S/B 13088 CONCERNING REWORK OF THE HOUSING TO ALLEVIATE THIS PROBLEM. (M)

Part: SPAR — CORRODED (COCKPIT)

FOUND CORROSION ON FORWARD SIDE OF MAIN WING SPAR LOWER CAP BOND ASSY. THE AFFECTED AREA IS UNDER THE CABIN FLOOR IN THE CABIN. CORROSION WAS FOUND ON THE FORWARD FACE OF THE SPAR AND WAS DISTRIBUTED IN SMALL AREAS ACROSS THE SPAR JUST ABOVE THE EDGE OF THE SEALANT THAT IS USED TO SEAL THE SPAR RIVET FLANGE. CORROSION WAS FOUND WITHIN THE LIMITS OF NEGLIGIBLE DAMAGE AFTER CORROSION REMOVAL.

Part: MOTOR — OVERHEATED (CABIN VENT)

CREW REPORTED VERY STRONG SMELL OF SOMETHING ELECTRICAL BURNING. AIRCRAFT RETURNED TO ANC AND LANDED WITH NO PROBLEMS. MAINTENANCE FOUND SHORTED VENT BLOWER MOTOR. REPLACED VENT BLOWER, AIRCRAFT RETURNED TO SERVICE.

Part: WIRE — FAILED (BRAKE DE-ICE)

UPON LANDING AT ANC, RUNWAY 6L PILOT EXPERIENCED UNCOMMANDED BRAKING ACTION ON THE LT MLG. A/C CONTINUED LANDING ROLLOUT AND STOPPED AT THE INTERSECTION OF 6L AND 6R. THERE WAS NO DAMAGE TO THE A/C. MAINTENANCE FOUND NR 1 AND 2 BRAKES FROZEN. MAINTENANCE DETERMINED THAT THE NR 1 BRAKE DE-ICE SYSTEM WAS NOT WORKING. FOUND AND REPAIRED OPEN BUTT SPLICE ON WIRE FROM BRAKE DE-ICE SWITCH TO BRAKE DE-ICE PCB. BRAKE DE-ICE OPS CHECK OK, AIRCRAFT RETURNED TO SERVICE. (M)

Part: LIGHT SOCKET — LOOSE (COCKPIT)

ABQ - CREW REPORTED THAT THE GREEN DOWN AND LOCKED LOG ANNUNCIATOR DID NOT ILLUMINATE WHEN GEAR WAS EXTENDED. FOLLOWING AN UNEVENTFUL LANDING. MAINTENANCE REPAIRED ANNUNCIATOR LIGHT SOCKET. SYSTEM CHECKS OK. (M)