LAX87LA098 · Grumman AA-1B
Grumman AA-1B · Accident: total loss of engine power (mechanical failure) during initial climb
From 104 · Tracy, CA to Livermore Municipal Airport (LVK)
Event
- NTSB case
- LAX87LA098
- Event typeAccident: someone killed or seriously injured, or the aircraft substantially damaged (NTSB definition). Incident: an occurrence that affected or could have affected safety, short of that. Glossary
- Accident
- InvestigationHow far the investigation had got when the record was published: preliminary, ongoing, final or completed. Unknown where the source does not say. Glossary
- Completed
- API-reported fatalities
- 0 · all aircraft and ground
- Ground fatalities
- 0
- OperationWhat kind of flying it was, grouped by the rules it flew under: airline (US Part 121), air taxi and commuter (Part 135), general aviation (Part 91 and similar), military or government. Glossary
- General aviation
- WeatherVisual meteorological conditions (VMC): good enough to fly by looking outside. Instrument conditions (IMC): cloud or low visibility, flying by instruments. Glossary
- Visual Meteorological Cond
Grumman AA-1B
- Aircraft type
- Grumman AA-1
- Category
- Airplane
- RegistrationThe aircraft's tail number, such as N12345 or G-ABCD. Registrations are reissued, so the same one years apart can be a different aircraft. Glossary
- N1408R
- Operator
- Unknown
- Onboard fatalities
- Unknown
- Route
- From 104 · Tracy, CATo Livermore Municipal Airport (LVK), Livermore, CA
- Aircraft age
- Not recorded
- Flight rulesThe regulations the flight operated under: in the US, Part 91 (general aviation), Part 121 (airlines), Part 135 (air taxi and commuter) and others; for flights abroad, the NTSB's coarser commercial or non-commercial code. Glossary
- Part 91: General Aviation
- Phase of flightThe stage of the flight when things started to go wrong: standing, taxi, takeoff, initial climb, en route, maneuvering, approach or landing. Glossary
- Initial climb
- First occurrenceThe single coded event the NTSB judges best describes what happened (records from 2008 on). Older records name the first occurrence in the sequence instead. Glossary
- Total loss of engine power (mechanical failure)
- DamageDestroyed: beyond practical repair. Substantial: damage that affects the structure, performance or handling and normally needs major repair. Minor: less than that. Glossary
- Substantial
Cause areas
- Engine assembly, piston › Incorrect
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
JUST AFTER TAKEOFF WHILE CLIMBING THROUGH 200 FT AGL THE ENGINE QUIT. THE PILOT MADE A FORCED LANDING IN A GRAVEL PIT WHERE THE AIRCRAFT COLLIDED WITH A BANK. EXAMINATION OF THE ENGINE REVEALED THAT THE #1 CYLINDER AND PISTON HAD MODERATE TO SEVERE SCUFFING AND THE RINGS WERE OVER LAPPING IN SEVERAL PLACES BY METAL TRANSFER. THE #1 PISTON WAS A NEW PISTON WITH P10 STAMPED ON THE INSIDE TO INDICATE IT WAS A .010 OVERSIZED PISTON. THE REMAINING PISTONS WERE STANDARD SIZE.
Verbatim NTSB analysis from the NTSB dataset
Sources
NTSB record LAX87LA098
- Event ID
- 20001213X30109
- Case number
- LAX87LA098
- Dataset
- historical-pre2008
- Source SHA-256
- 89e2df6d848e7ab3b42e7d7c7a03ff403303057a26ca04c95b3ea67201c3ce74
Source notes (4)
- Unreviewed is an editorial label, not an investigation status. API-sourced is not report-checked or human-reviewed. Explicit event totals are used without summing aircraft injury tables; onboard allocation is withheld. Unknown values remain unknown. The operation category is mapped from the NTSB-reported FAR part and has not been reviewed.
- Filled from the NTSB case API where the bulk record had no value: local date, investigation status. Values present in the bulk record are kept.
- The date is the local date; the NTSB stores the UTC date 1987-01-26.
- API snapshot SHA-256: afe33e9fb8a15db04493a67156783c7992d4afd3bf7a6f3528d30562ba29baa0; retrieved 2026-09-22T01:05:29.021Z.