# Accident 19870713042009A: Gulstm 500B, Mason City, IA, July 13, 1987

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: July 13, 1987, 20:17 local time
- Place: Mason City, IA
- Airport: Mason City Municipal
- Damage: Destroyed
- Phase of flight: To Init Climb(1st Pwr Reduct)
- Operating rules: Air taxi and commuter (Part 135)
- Operator: DLOA
- Location: 43.1500° N, 93.1901° W: From the FAA, an estimate near the named town, within about 3 miles
- Nearby events: https://openairdocs.org/map.md?lat=43.1500&lon=-93.1901&mi=10
- Aircraft: N9391R, a cancelled registration (https://openairdocs.org/deregistered/N9391R-1991-03-25) (OpenAirDocs)
- Registry model: Aero Commander 500-B (registry code 0141106, https://openairdocs.org/model/aero-commander-500-b) (OpenAirDocs)
- Reported make and model: GULSTM 500B
- Reported engine: LYC IO540*
- Fatal injuries: 0
- Pilot flight hours: 1,561 total, 81 in this make and model, 81 in the last 90 days
- NTSB investigation: [NTSB MKC87FA138](https://openairdocs.org/ntsb/MKC87FA138) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19870713042009A

## Narrative

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

EVIDENCE INDICATES PILOTS SEAT NOT LOCKED SLID REARWARD O N TAKEOFF. PILOT UNABLE TO CONTROL. STALLED AND CRASHED

## 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 MKC87FA138](https://openairdocs.org/ntsb/MKC87FA138), Jul 14, 1987: Aero Commander 500-B (N9391R), Mason City, IA, destroyed

## Other reports on N9391R (1)

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

- [Incident 19831220074629I](https://openairdocs.org/incident/19831220074629I), Dec 20, 1983: Gulstm 500B (N9391R), Lincoln, NE, Minor damage. Prop fluctuated,oil pressure dropped. Landed off side of runway,collapsed nose gear. NR5 and NR6 bearings worn out.

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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