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20050102000119I

Incident
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FAA incident report · Socata TBM700 · Waterloo, IA · January 2, 2005

FAA Aviation Safety Information Portal

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Date
January 2, 2005 · 11:30 local
Place
Waterloo, IA
Airport
Waterloo Municipal
Phase of flight
Descent
Operating rules
General operating rules (Part 91)
Aircraft
N6720Y
Reported as
Socata TBM700
People aboard
3
Fatal injuries
0
Pilot’s flight hours
5,000 total560 in this make and model100 in the last 90 days

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) Aircraft was in cruise flight at FL 290 on an IFR flight from johnson county, Kansas city, MO (ojc) to rhinelander, WI (rhi). The PIC initiated a descent using the autopilot. The a/p immediately disengaged and the aircraft pitched up violently. With the help of a passenger (rated pilot) the PIC was able to maintain control of the aircraft. An emergency was declared and the aircraft diverted to Waterloo, IA (alo). The aircraft descended to 8000 feet. While determining controllability in the landing configuration, a temperature inversion occurred and the trim actuator began to work. The aircraft made an uneventful landing at alo. It was determined that the trim actuator had frozen during climb out. A service bulletin calling for the actuator to be lubed and the boot covering the actuator to be reinstalled with the drain holes facing down at the next scheduled inspection. The owner elected to comply with this bulletin immediately. During that procedure it was determined that the boots had been installed from the factory incorrectly. The drain holes were facing upward. The aircraft had been parked over night on the ramp in light rain and drizzle prior to this flight. Total airframe hours = 255.

As the FAA filed it

(-23) AIRCRAFT WAS IN CRUISE FLIGHT AT FL 290 ON AN IFR FLIGHT FROM JOHNSON COUNTY, KANSAS CITY, MO (OJC) TO RHINELANDER, WI (RHI). THE PIC INITIATED A DESCENT USING THE AUTOPILOT. THE A/P IMMEDIATELY DISENGAGED AND THE AIRCRAFT PITCHED UP VIOLENTLY. WITH THE HELP OF A PASSENGER (RATED PILOT) THE PIC WAS ABLE TO MAINTAIN CONTROL OF THE AIRCRAFT. AN EMERGENCY WAS DECLARED AND THE AIRCRAFT DIVERTED TO WATERLOO, IA (ALO). THE AIRCRAFT DESCENDED TO 8000 FEET. WHILE DETERMINING CONTROLLABILITY IN THE LANDING CONFIGURATION, A TEMPERATURE INVERSION OCCURRED AND THE TRIM ACTUATOR BEGAN TO WORK. THE AIRCRAFT MADE AN UNEVENTFUL LANDING AT ALO. IT WAS DETERMINED THAT THE TRIM ACTUATOR HAD FROZEN DURING CLIMB OUT. A SERVICE BULLETIN CALLING FOR THE ACTUATOR TO BE LUBED AND THE BOOT COVERING THE ACTUATOR TO BE REINSTALLED WITH THE DRAIN HOLES FACING DOWN AT THE NEXT SCHEDULED INSPECTION. THE OWNER ELECTED TO COMPLY WITH THIS BULLETIN IMMEDIATELY. DURING THAT PROCEDURE IT WAS DETERMINED THAT THE BOOTS HAD BEEN INSTALLED FROM THE FACTORY INCORRECTLY. THE DRAIN HOLES WERE FACING UPWARD. THE AIRCRAFT HAD BEEN PARKED OVER NIGHT ON THE RAMP IN LIGHT RAIN AND DRIZZLE PRIOR TO THIS FLIGHT. TOTAL AIRFRAME HOURS = 255.