N712AL
Registered owner: ALASKA AIRLINES INC, WA (owner ≠ operator)
Operators of this aircraft
Who operated this tail, and how firmly we know it.
No operator established for this aircraft.
Accident & incident history
No NTSB accidents or incidents on file for this aircraft.
Maintenance disclosures
Service Difficulty Reports filed with the FAA for this airframe. Filing is largely voluntary — the number of reports is not a measure of reliability. To verify a report, search its control number at the FAA SDRS site.
15 reports on file, 1995-03-13 – 2000-10-13.
Part: EXPLOSIVE LINK — DISCHARGED (RT MLG DOOR) · airframe 18,158 hrs
AIRCRAFT FLOATS WERE INADVERTENTLY DISCHARGED. MALFUNCTION WAS DISCOVERED DURING REMOVAL OF RT MAIN GEAR DOOR. EXPLOSIVE CHARGE DISCHARGED WHEN FLOATS TRIPPED, BUT LINK DID NOT SEPARATE. (X)
Part: LINK — FAILED (MLG FLOATS) · airframe 18,158 hrs
FLOATS WERE INADVERTENTLY INFLATED. LINK DID NOT SEPARATE AT SHEAR POINT. (X)
Part: BLADE — DEBONDED (MAIN ROTOR) · airframe 18,103 hrs
DISCOVERED DURING POST-FLIGHT INSPECTION (VIBRATION WAS FELT DURING FLIGHT). EXTENSIVE UPPER SURFACE SKIN DISBOND. (X)
Part: BLADE — DEBONDED (MAIN ROTOR)
DURING 500-HOUR INSPECTION, FOUND TIP PLATE COMPLETELY DEBONDED. (X)
Earlier reports · 1995–1998 · 11 reports
1998
Part: BLADE — DEBONDED (MAIN ROTOR)
DISCOVERED DURING 500-HOUR INPSECTION, TIP RIB STRAP DEBONDED, (RECURRING PROBLEM). TIP RIB STRAPS REPLACED BY C.T.I. 04-04-97, TT: 6,245.1 HOURS. 05-19-97, TT: 6,340.1 HOURS, AND 12-23-97, TT: 7,207.8 HOURS.
Part: BLADE — DEBONDED (MAIN ROTOR)
DISCOVERED DURING 500-HOUR INSPECTION, TIP RIB STRAP DEBONDED (RECURRING PROBLEM WITH THIS BLADE). TIP RIB STRAPS REPLACED BY C.T.J. 4-4-97 TT 6,245.1 HOURS - 5-19-97 TT 6,340-1 HOURS - 12-23-98 TT 7,207.8 HOURS.
Part: GEARBOX — MAKING METAL (MAIN ROTOR)
UPON INSPECTION OF GEARBOX PARTS DURING DISASSEMBLY, FOUND CUT O-RING UNDER SCREEN NR 6840136 IN OIL DELIVERY TUBE OIL PASSAGE. THIS COULD HAVE CAUSED RESTRICTED OIL FLOW TO OIL DELIVERY TAKE WHICH LUBES 2-1/2 BEARING AREA. SUBMITTER STATED LACK OF OIL IN 2-1/2 BEARING WAS POSSIBLY CAUSE FOR 2-1/2 BEARING BREAK-UP.
1997
Part: DETECTOR — MALFUNCTION (NR 2 FORWARD)
DURING CRUISE FLIGHT, NR 2 FIRE LIGHT ILLUMINATED. RETURNED TO BASE. NO FIRE-FLAME. DETECTOR MALFUNCTION.
1996
Part: BLADE — CRACKED (M/R)
DISCOVERED DURING 500 HOUR INSPECTION, FOUND BLADE SKIN CRACKED ALONG FORWARD EDGE OF TRIM TAB.
Part: BLADE — DEBONDED (M/R)
DURING 500 HOUR INSPECTION FOUND BLADE TIP RIB DEBONDED.
1995
Part: N1 CABLE — BROKEN (THROTTLE LEVER)
AFTER COMPLETION OF THE ENGINE WASH, ATTEMPTED TO START NR 1 ENGINE FOR A DRYING RUN. THE ENGINE WOULD NOT LIGHT-OFF AND THE THROTTLE LEVER WAS STUCK IN THE FLIGHT POSITION. NR 1 THROTTLE CABLE WAS INSPECTED AND FOUND BROKEN APPROXIMATELY 3.50 INCHES FROM THE POINT WHERE THE SHAFT ATTACHES TO THE FLEX PORTION OF THE INTERNAL CABLE. THIS BREAK WAS AT THE FUEL CONTROL END OF THE CABLE.
Part: HOSE — LEAKING (NLG WELL)
DURING CRUISE FLIGHT, NR 2 HYDRAULIC SYSTEM STARTED A SLIGHT DROP BELOW RED LINE (3000 PSI) TO 2350-2500 PSI. LANDING GEAR ACTUATED TO DOWN POSITION. LANDING GEAR INDICATED SAFE. UPON INSPECTION, NOSE LANDING GEAR UP HYD FLEX HOSE WAS FOUND LEAKING. FLEX HOSE HAS NO APPARENT EXTERNAL DEFECTS. NOTE: HOSE WAS MANUFACTURED 8-83.
Part: ROD — WORN (DAMPER)
SHOP REPAIR OF DAMPER ASSY DUE TO LEAKING OIL. HEAVY WEAR TO ROD INNER SEAL SURFACE. ROD WORN BEYOND REPAIR LIMIT.
Part: BLADE — CRACKED (M/R)
DISCOVERED WHEN COMPLYING WITH AD 84-10-2, 500-HOUR INSPECTION. FOUND CRACK IN SPAR AT ROOT END LOWER SIDE ON BLADE EXTENDING FROM FORWARD OUTBOARD BUSHING HOLE TO LEADING EDGE APPROXIMATELY 1.5 INCHES LONG.
Part: BLADE — CRACKED (M/R TIP)
DEFECT DISCOVERED DURING C.A.M.P. 500-HOUR BLADE INSPECTION, FOUND CRACK IN SPAR AND LOWER SKIN AT TIP END EXTENDING INBOARD FROM APPROXIMATELY STA 249.88 TO STA 247.65. CAUSE UNKNOWN.