20080926848249I

Incident · No damage

FAA incident report · Boeing 747-451 · Tokyo, JA · September 26, 2008

Date: September 26, 2008 · 14:55 local
Place: Tokyo, JA
Airport: New Tokyo International-Narita
Phase of flight: Climb
Operating rules: Air carrier (Part 121)
Operator: NWAA
Damage: No damage
Aircraft: N666US
Reported as: Boeing 747451
Reported engine: Pratt & Whitney PW4056
People aboard: 422
Fatal injuries: 0
Pilot’s flight hours: 0 total0 in this make and model0 in the last 90 days

N666USRegistration cancelled Oct 25, 2018 · Boeing 747-451S/N 23821 · Built 1989 Airframe modelBoeing 747-451 Engine modelPratt & Whitney PW4000 seriesTurbo-fan

From the FAA’s Accident/Incident Data System (AIDS), through its Aviation Safety Information Portal, as reported. The NTSB investigates accidents separately, and its record of an accident is the fuller one. The aircraft is matched to the registry by N-number and event date, checked against the reported make and model; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

What happened

The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.

(-23) Nwa flt #20, on climb-out after retracting flaps at approximately 5,000 feet the aircraft displayed an eicas message "stab trim 3". Shortly after, another eicas message appeared "stab trim 2", followed by an "autopilot" caution. The stabilizer trim was stuck at 5.8 units of stab trim. Left and right manual trim switches and alternate trim was ineffective. An emergency was declared and the aircraft landed without incident. The stab trim drive (p/n 65B80562) mechanism was replaced and the aircraft returned to service.

As the FAA filed it

(-23) NWA FLT #20, ON CLIMB-OUT AFTER RETRACTING FLAPS AT APPROXIMATELY 5,000 FEET THE AIRCRAFT DISPLAYED AN EICAS MESSAGE "STAB TRIM 3". SHORTLY AFTER, ANOTHER EICAS MESSAGE APPEARED "STAB TRIM 2", FOLLOWED BY AN "AUTOPILOT" CAUTION. THE STABILIZER TRIM WAS STUCK AT 5.8 UNITS OF STAB TRIM. LEFT AND RIGHT MANUAL TRIM SWITCHES AND ALTERNATE TRIM WAS INEFFECTIVE. AN EMERGENCY WAS DECLARED AND THE AIRCRAFT LANDED WITHOUT INCIDENT. THE STAB TRIM DRIVE (P/N 65B80562) MECHANISM WAS REPLACED AND THE AIRCRAFT RETURNED TO SERVICE.