# Accident 19980712016519A: Piper PA18150, Hyampom, CA, July 12, 1998

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: July 12, 1998, 08:20 local time
- Place: Hyampom, CA
- Damage: Substantial damage
- Phase of flight: Fcd/Prec Ldg From Cruise
- Operating rules: General operating rules (Part 91)
- Location: 40.5994° N, 123.3994° W: From the FAA, an estimate near the named town, within about 3 miles
- Nearby events: https://openairdocs.org/map.md?lat=40.5994&lon=-123.3994&mi=10
- Aircraft: N6248R, registered now (https://openairdocs.org/aircraft/N6248R) (OpenAirDocs)
- Registry model: Piper PA-18-150 (registry code 7101828, https://openairdocs.org/model/piper-pa-18-150) (OpenAirDocs)
- Registry engine: Lycoming 0-360-A1D (registry code 41504, https://openairdocs.org/engine/lycoming-0-360-a1d) (OpenAirDocs)
- Reported make and model: PIPER PA18150
- Reported engine: LYC O360C2A
- People aboard: 1
- Fatal injuries: 0
- Pilot flight hours: 192 total, 192 in this make and model, 21 in the last 90 days
- NTSB investigation: [NTSB LAX98LA230](https://openairdocs.org/ntsb/LAX98LA230) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19980712016519A

## Narrative

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

(.4) AFTER TAKEOFF, THE AIRPLANE MADE A CLIMBOUT OVER MOUNTAINOUS TERRAIN. AFTER CLEARING THE TERRAIN, THE PILOT REDUCED THE POWER AND DESCENDED INTO AN OPEN VALLEY.  APPROXIMATELY 1,800 FEET ABOVE THE GROUND LEVEL, HE ADVANCED THE THROTTLE, BUT DID NOT RECEIVE AN INCREASE IN ENGINE POWER. THE PILOT DECLARED AN EMERGENCY AND ATTEMPTED TO LAND ON A NARROW GRAVEL BAR NEXT TO A RIVER.  THE MAIN LANDING GEAR SKIMMED OVER THE WATER AND UP ONTO THE GRAVEL BAR EDGE.  THE LEFT MAIN GEAR SUNK INTO THE SOFT GRAVEL AT THE WATERS EDGE AND THE AIRCRAFT CAME TO REST INVERTED ON THE GRAVEL BAR. THE PILOT STATED THAT AN ANNUAL INSPECTION HAD BEEN PERFORMED 11 DAYS PRIOR TO THE ACCIDENT, AND THE AIRPLANE HAD ACCUMULATED 3 FLIGHT HOURS SINCE THE INSPECTION.  HE FURTHER REPORTED THAT WHEN HE INSPECTED THE THROTTLE CABLE ASSEMBLY, FOLLOWING THE ACCIDENT, HE NOTED THAT IT HAD BECOME DETACHED FROM THE CARBURETOR THROTTLE ARM DUE TO A MISSING BOLT, NUT, AND COTTER PIN.  THE FAA WAS UNABLE TO VERIFY THAT THOSE COMPONENTS WERE MISSING AS THE PILOT HAD REPAIRED AND FERRIED THE AIRCRAFT TO ANOTHER LOCATION.                                                                                                       (-23) DURING FLIGHT THE PILOT EXPERIENCED A LOSS OF ENGINE POWER AND WAS FORCED TO MAKE AN OFF AIRPORT LANDING ON A SAND BAR. DURING LANDING THE LANDING GEAR CONTACTED SOME WATER AND THE AIRCRAFT CAME TO A REST INVERTED. DAMAGE TO THE RIGHT WING INCLUDING A BENT SPAR AND LIFT STRUTS, ALSO DAMAGE TO CABIN STRUCTURE.

## 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 LAX98LA230](https://openairdocs.org/ntsb/LAX98LA230), Jul 12, 1998: Piper PA-18-150 (N6248R), Hyampom, CA, substantial damage. Probable cause: Inadequate annual inspection that resulted in a partial loss of engine power due to a missing bolt, nut, and cotter pin from the throttle/carburetor assembly.

## Other reports on N6248R (2)

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

- [Incident 20140402005249I](https://openairdocs.org/incident/20140402005249I), Apr 2, 2014: Piper PA-18-150 (N6248R), Birchwood, AK, Minor damage. PIC of N6248R landed on runway 20R at Birchwood Airport. During landing touchdown PIC lost directional control of aircraft. PIC attempted to regain control of…
- [Accident 20110623012379A](https://openairdocs.org/incident/20110623012379A), Jun 23, 2011: Piper PA-18-150 (N6248R), Tyonek, AK, Substantial damage. While landing on mcarthur river sandbank, pilot touched down and applied the brakes over aggressively. Aircraft rotated forward contacting the propeller and…

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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