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Incident

FAA incident report · Boeing 737-524 · Cleveland, OH · April 8, 1997

Date: April 8, 1997 · 14:42 local
Place: Cleveland, OH
Airport: Cleveland-Hopkins International
Phase of flight: Normal Cruise
Operating rules: Air carrier (Part 121)
Operator: CALA
Aircraft: N14613
Reported as: Boeing 737524
People aboard: 2
Fatal injuries: 0
Pilot’s flight hours: 10,000 total228 in the last 90 days

N14613Registration cancelled Aug 13, 2012 · Boeing 737-524S/N 27326 · Built 1994 Airframe modelBoeing 737-524 Engine modelCFM International CFM56 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.

Narrative: aircraft was at top of climb and experienced five (5) uncontrolled rudder kicks (yaw) (2) left (2) right and then (1) left. Autopilot kicked off by the first set of yaws. Yaw damper sw was turned off. Remainder of flt was normal. Emerg. Equipment was called out and standing by with no further incident. Maint. Accomplished a bite system test on yaw coupler, steps 1-4 failed. Found pins 32 gnd open from coupler to rudder pcu.

As the FAA filed it

NARRATIVE: AIRCRAFT WAS AT TOP OF CLIMB AND EXPERIENCED FIVE (5) UNCONTROLLED RUDDER KICKS (YAW) (2) LEFT (2) RIGHT AND THEN (1) LEFT. AUTOPILOT KICKED OFF BY THE FIRST SET OF YAWS. YAW DAMPER SW WAS TURNED OFF. REMAINDER OF FLT WAS NORMAL. EMERG. EQUIPMENT WAS CALLED OUT AND STANDING BY WITH NO FURTHER INCIDENT. MAINT. ACCOMPLISHED A BITE SYSTEM TEST ON YAW COUPLER, STEPS 1-4 FAILED. FOUND PINS 32 GND OPEN FROM COUPLER TO RUDDER PCU.