# Accident 19971125040819A: Stbros SD360, Billings, MT, November 25, 1997

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: November 25, 1997, 08:15 local time
- Place: Billings, MT
- Airport: Billings Logan International
- Damage: Substantial damage
- Phase of flight: Roll-Out (Fixed Wing)
- Operating rules: Air carrier (Part 121)
- Operator: HYSA
- Location: 45.8697° N, 108.4695° W: From the FAA, an estimate near the named town, within about 3 miles
- Nearby events: https://openairdocs.org/map.md?lat=45.8697&lon=-108.4695&mi=10
- Aircraft: N691A, a cancelled registration (https://openairdocs.org/deregistered/N691A-2004-09-07) (OpenAirDocs)
- Registry model: Short Bros SHORTS SD3-60 (registry code 8100605, https://openairdocs.org/model/short-bros-shorts-sd3-60) (OpenAirDocs)
- Registry engine: Amateur-built UNKNOWN ENG (registry code 99999, https://openairdocs.org/engine/amateur-built-unknown-eng) (OpenAirDocs)
- Reported make and model: STBROS SD360
- People aboard: 2
- Fatal injuries: 0
- NTSB investigation: [NTSB SEA98LA016](https://openairdocs.org/ntsb/SEA98LA016) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19971125040819A

## Narrative

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

THE SHORT BROTHERS SD3-60 CARGO FLIGHT WAS BEING VECTORED FOR THE VOR/CME RWY 28R APPRAOCH TO THE BILLINGS LOGAN INTERNATIONAL AIRPORT DURING INSTRUMENT METEOROLOGICAL CONDITIONS. WEATHER CONDITIONS ONE MINUTE BEFORE THE ACCIDENT WERE WINDS 020 AT 13 KNOTS, LIGHT SNOW AND MIST, AND VISIBILITY WAS DETERIORATING RAPIDLY. THE CO-PILOT (OCCUPYING THE RIGHT SEAT) WAS FLYING THE AIRCRAFT, AND THE PIC (OCUPYING THE LEFT SEAT) WAS HANDLING RADIO COMMUNICATIONS. AT 0812:25, HAVING CROSSED THE FINAL APPROACH FIX, THE AIRCRAFT DESCENDED THROUGH 100 FEET ABOVE THE MDA (3,940 FEET OR 426 FEET ABOVE THE RUNWAY THRESHOLD), AND IMMEDIATELY THEREAFTER THE CREW VISUALLY ACQUIRED THE RUNWAY, AT 0813:01 THE AIRCRAFT'S GPWS ALERT OF 'SINK RATE' WAS HEARD, FOLLOWED 2 SECONDS LATER BY THE PIC CALLING FOR 'POWER', AND A 2 SECOND DELAY TO GROUND IMPACT. THE CO-PILOT HAD LOGGED A TOTAL OF 103 HOURS IN THE SD3-60(ALL WITHIN THE PREVIOUS 90 DAYS,) WHILE THE PIC HAD JUST BEGUN FLYING THE AIRCRAFT IN MONTANA'S LATE FALL WEATHER AFTER A 6 YEAR ASSIGNMENT FLYING IN THE HAWAIIAN ISLANDS. THE LEFT MAIN LANDING GEAR COLLAPSED IN OVERLOAD DURING THE GROUND IMPACT.

## The NTSB's investigation of this event (1)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB SEA98LA016](https://openairdocs.org/ntsb/SEA98LA016), Nov 25, 1997: Short Brothers SD3-60 (N691A), Billings, MT, substantial damage. Probable cause: The co-pilot's failure to maintain the proper descent rate on final approach, the pilot-in-command's delayed remedial action, and overload of the left main landing gear assembly. Factors contributing…

## Other reports on N691A (2)

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

- [Incident 19870310012969I](https://openairdocs.org/incident/19870310012969I), Mar 10, 1987: Stbros SD360 (N691A), Windsor Locks, CT. Unsafe nose gear indication, emergency procedures used. Diverted to a safe landing. Down lock switch crushed.
- [Incident 19870101003749I](https://openairdocs.org/incident/19870101003749I), Jan 1, 1987: Stbros SD360 (N691A), Groton, CT. Left engine oil pressure light came on and shutdown accomplished. Uneventful landing. Power section had seized.

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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