- Date
- January 26, 1993, 09:52 local (14:52 UTC)
- Place
- Detroit, MI
- Injuries
- 42 uninjured
- Damage
- No damage
- Phase of flight
- Enroute
- Aircraft
- N452USFokker F-28 MK 1000
- Weather
- Visual (VMC) · Day
- Status
- Completed · report August 26, 1994
- Report
- Approved by Office Director
- FAA report
- 19930126003649I
- Case key
- 15594
From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the incident.
On this page
Probable cause
Improper lubrication of the horizontal stabilizer gearbox by company maintenance personnel. A factor was the manufacturer's inadequate service procedure.
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.
Analysis
The captain obtained no response to nose-up stabilizer trim during descent. Normal nose-down trim remained operable; alternate trim was not attempted. The crew reported a jammed stabilizer and landed with nose-down trim. Disassembly of the horizontal stabilizer control unit showed inadequate lubricant and extensive corrosion in a gearbox. The airframe manufacturer's procedure for replenishing the gearbox lubricant could result in underservicing. The operator observed a gearbox service interval which was 250% of the manufacturer's recommendation.
Aircraft
- Registration
- N452US
- Reported as
- Fokker F-28 MK 1000 (F.28 MK 10)
- Category
- Airplane
- Serial number
- 11105
- Airframe hours
- 30,309
- Engine
- Rolls-Royce SPEY 555-15, 9,850 lbs thrust, turbo jet
- Damage
- No damage
- Flight
- Part 121
- Operator
- Usair, doing business as Usair
- Registered owner
- Usair
- Airworthiness certificate
- Standard, Transport
- Last inspection
- Continuous airworthiness · March 9, 1992 · 1,265 hours before
- Departed
- BWI · Baltimore, MD
- 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
- 50
- Certificate
- Airline transport
- Airplane ratings
- Multi-engine land, Single-engine land
- Instrument ratings
- Airplane
- Medical
- Class 1, Valid Medical--no waivers/lim.
- Seat
- Left
- Flight hours
- 10,900 total · 4,400 in this make and model · 151 in the last 90 days · 85 in the last 30 days
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- 180° at 14 knots
- Visibility
- 20 statute miles
- Lowest ceiling
- 2,000 ft broken
- Temperature
- 25 °F, dew point 18 °F
- Altimeter
- 30.00 inHg
- Observed at
- DTW, 15 nm away
FAA reports on this event · 1
The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.