# Incident 19870320015099I: Swrngn SA226TC, Great Falls, MT, March 20, 1987

- Type: FAA incident report (Accident/Incident Data System), as reported
- Date: March 20, 1987, 06:31 local time
- Place: Great Falls, MT
- Airport: Great Falls International
- Phase of flight: Climb
- Operating rules: Air taxi and commuter (Part 135)
- Operator: BSAA
- Location: 47.4823° N, 111.3703° W: Placed by OpenAirDocs at GREAT FALLS INTL (GTF), within about a mile (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=47.4823&lon=-111.3703&mi=10
- Aircraft: N5474M, a cancelled registration (https://openairdocs.org/deregistered/N5474M-1990-02-22) (OpenAirDocs)
- Registry model: Swearingen SA226TC (registry code 8780404, https://openairdocs.org/model/swearingen-sa226tc) (OpenAirDocs)
- Reported make and model: SWRNGN SA226TC
- People aboard: 6
- Fatal injuries: 0
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19870320015099I

## Narrative

As the FAA filed it, in capitals; the FAA replaces private details with ^PRIVACY DATA OMITTED^.

THE AIRCRAFT FAILED TO PRESSURIZE AFTER TAKEOFF. AIRCRAFT HAD BEEN PARKED OUTSIDE AND A VALVE HAD BECOME FROZEN.

## Other reports on N5474M (9)

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

- [Incident 19890722049969I](https://openairdocs.org/incident/19890722049969I), Jul 22, 1989: Swrngn SA226TC (N5474M), Missoula, MT. Cabin door warning light on after takeoff. Returned. Found door bell crank connecting rod bent. Not engaging switch
- [Incident 19890721049959I](https://openairdocs.org/incident/19890721049959I), Jul 21, 1989: Swrngn SA226TC (N5474M), Billings, MT. Unable to achieve proper torque and EGT on takeoff roll. Aborted. Fuel control maximum fuel adjustment set too low
- [Incident 19890713051409I](https://openairdocs.org/incident/19890713051409I), Jul 13, 1989: Swrngn SA226TC (N5474M), Billings, MT. Right generator failed on climbout. Returned. Found a broken wire at the generator field circuit connector terminal
- [Incident 19890405021839I](https://openairdocs.org/incident/19890405021839I), Apr 5, 1989: Swrngn SA226TC (N5474M), Billings, MT. Unable to pressurize aircraft. Returned. Door seals not inflating due to switches being out of adjustment.
- [Incident 19890301016529I](https://openairdocs.org/incident/19890301016529I), Mar 1, 1989: Swrngn SA226TC (N5474M), Billings, MT. Unable to pressurize on climbout. Returned. Landing gear squat switch was frozen. Cleaned,lubed and put in service.
- [Incident 19890114006599I](https://openairdocs.org/incident/19890114006599I), Jan 14, 1989: Swrngn SA226TC (N5474M), Billings, MT. Unsafe gear indication. Used emergency procedures and landed without incident. Unable to duplicate malfunction.
- [Incident 19890101006139I](https://openairdocs.org/incident/19890101006139I), Jan 1, 1989: Swrngn SA226TC (N5474M), Great Falls, MT. Get a nose gear unsafe light. Cranked gear down. Landed safely. Found uplock release strikers out of adjustment.
- [Incident 19881121065479I](https://openairdocs.org/incident/19881121065479I), Nov 21, 1988: Swrngn SA226TC (N5474M), Billings, MT. Pilots artificial horizon failed on climbout. Returned safely. Replaced artificial horizon.
- [Incident 19870327027219I](https://openairdocs.org/incident/19870327027219I), Mar 27, 1987: Swrngn SA226TC (N5474M), Helena, MT. Intransit light remained on with no safe indication for nose gear. Safe landing. Broken wire on uplock switch.

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft 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. For accidents, the NTSB's own investigation is the fuller record.

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