MKC85IA045

NTSB incident investigation · Swearingen SA226TC · St. Louis, MO · January 4, 1985

Incident · No injuriesIncident investigationFinal report
Date
January 4, 1985, 16:10 local (22:10 UTC)
Place
St. Louis, MO
Injuries
5 uninjured
Damage
No damage
Phase of flight
Enroute
Aircraft
N322BASwearingen SA226TC
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
Case key
33870

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the incident.

On this page

Sequence of events

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

Airframe/component/system failure/malfunctionCruise - normal
Flt control syst,elevator trim/tab control - erratic
Maintenance,overhaul - inadequateOther maintenance personnelCause
Inadequate surveillance of operationFaa(organization)Factor

Analysis

After departing st Louis and reaching cruise flt the crew experienced a continual trim pitch-up which had to be relieved by a reduced airspeed. No aural indication was noted by the crew. The return to the airport was uneventful. Follow-up inspection of the trim system revealed a out of tolerance trim actuator with 355 operational hours since o-time overhaul. Normal life for a trim actuator is abt 2000 hours. This unit was certified as o-time by an FAA certified shop. A teardown inspection of the trim actuator unit revealed that the unit was not overhauled to specifications of the unit manufacturer. The trim actuator was inadequate for operation as overhauled.

Aircraft

Registration
N322BA
Reported as
Swearingen SA226TC
Category
Airplane
Serial number
TC261
Airframe hours
13,923
Engine
Airesearch TPE3313UW303G, 940 horsepower, turbo prop
Damage
No damage
Flight
Part 135
Operator
Britt Airways
Registered owner
Britt Airways
Airworthiness certificate
Standard, Normal
Departed
STL · St. Louis, MO
Destination
Evansville, IN
Flight plan
IFR

Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
35
Certificate
Airline transport
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 1, Valid Medical--no waivers/lim.
Seat
Left

Weather

Conditions
Visual (VMC) · Day
Wind
290° at 13 knots
Visibility
7 statute miles
Lowest ceiling
None
Temperature
36 °F, dew point 27 °F
Altimeter
29.00 inHg
Observed at
STL, 6 nm away

Other investigations on N322BA · 1

Matched to the same aircraft by N-number and date.