- Date
- November 21, 1992, 01:29 local (08:29 UTC)
- Place
- Billings, MT
- Injuries
- 2 uninjured
- Damage
- Substantial damage
- Phase of flight
- Landing
- Aircraft
- N139PASwearingen SA-226TC
- Weather
- Visual (VMC) · Night/dark
- Status
- Completed · report May 26, 1993
- Report
- Approved by Office Director
- FAA report
- 19921121053389A
- Case key
- 42964
From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.
On this page
Probable cause
The NTSB’s determination of the probable cause, and any contributing factors.
Failure of a gear door roller, which necessitated a gear up landing. Factors include inadequate lubrication.
Analysis
After getting a gear unsafe light on the right main landing gear when the pilots attempted to extend the landing gear, they elected to fly back to their maintenance facility. After repeated attempts to rectify the problem, they successfully accomplished a precautionary gear up landing. Investigation revealed that the right main landing gear door roller was fractured and prevented the right main gear from extending.
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.
Aircraft
- Registration
- N139PA
- Reported as
- Swearingen SA-226TC
- Category
- Airplane
- Serial number
- TC-296
- Airframe hours
- 17,392
- Engine
- Garrett TPE-331-10UA, 840 horsepower, turbo prop
- Damage
- Substantial damage
- Flight
- Part 135
- Operator
- Big Sky Transportation Co, doing business as Big Sky Airlines
- Registered owner
- First Security Bank Utah, N.A.
- Airworthiness certificate
- Standard, Normal
- Last inspection
- AAIP · November 18, 1992 · 13 hours before
- Departed
- SDY · Sidney, MT
- Destination
- ISN · Williston, ND
- Flight plan
- IFR
- Airport
- BIL · Billings Logan Internat., runway 27, 10,528 × 150 ft, asphalt
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
- 40
- 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
- 8,851 total · 2,821 in this make and model · 6,738 as pilot in command · 165 in the last 90 days · 50 in the last 30 days · 3 in the last 24 hours
Weather
- Conditions
- Visual (VMC) · Night/dark
- Wind
- 180° at 6 knots
- Visibility
- 20 statute miles
- Lowest ceiling
- None
- Temperature
- 27 °F, dew point 19 °F
- Altimeter
- 30.00 inHg
- Observed at
- BIL, 1 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.