N9991F
N9991F is not currently registered. It was last assigned to a Helio HST-550A. The FAA cancelled the registration on August 26, 1988. The last status on file was "n-number assigned but not yet registered".
Helio HST-550A cancelled August 26, 1988
- Serial number
- 004
- Type
- Fixed-wing, single engine · Turboprop
- Year built
- —
- Last status
- N-number assigned but not yet registered
- Certificate issued
- —
- Last FAA action
- —
- Last owner
- Withheld
- Airworthiness
- None on file
NTSB accident and incident record under N9991F
LAX88FA241Accident on June 30, 1988 at Perris, CA: fatal, destroyed (1 fatal).
Aircraft on the NTSB record: Helio HST-550A · serial 004
FAILURE OF THE ELECTRICAL STABILIZER TRIM CONTROL THAT RESULTED IN AN UNCOMMANDED FULL NOSE DOWN ELEVATOR TRIM COMMAND.
A tail number passes between aircraft over the years; match the serial number on the NTSB record against the airframe above. Source: NTSB aviation accident database, records through September 30, 2026.
Source: FAA Civil Aviation Registry, Releasable Aircraft Database, October 2, 2026. See this number on the FAA site