ANC99LA137 · Stinson 108-2
Stinson 108-2 · Accident: loss of control on ground/water during landing
From Birchwood Airport (BCV) to Hector Silva Airstrip (BCV)
Event
- NTSB case
- ANC99LA137
- 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
Stinson 108-2
- Aircraft type
- Stinson 108
- 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
- N97978
- Operator
- Unknown
- Onboard fatalities
- Unknown
- Route
- From Birchwood Airport (BCV), BIRCHWOOD, AKTo Hector Silva Airstrip (BCV)
- 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
- Landing · landing roll
- 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
- Loss of control on ground/water
- 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
- Landing gear, normal brake system › Failure, partial
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
The first pilot, a certificated flight instructor, was providing tailwheel transition flight instruction to the second pilot, a certificated private pilot. The first pilot said that eight successful stop and go landings had been accomplished prior to the accident landing. He said that while landing on runway 19 and during the landing roll, the second pilot applied the brakes. The airplane subsequently ground looped to the right, and the left wing struck the ground, resulting in substantial damage to the left wing. The first pilot said that brake pedals were only installed at the left side pilot position. After the accident, the second pilot related to the first pilot that during brake application, the left brake pedal 'felt mushy' and was less effective than the right brake. An FAA airworthiness inspector examined the airplane at the accident airport, and reported signs of brake fluid leaking from the left brake assembly. He added that disassembly of the left brake assembly revealed 'severely weathered and worn seals.'
Probable cause
A partial failure of the brake system. A factor associated with the accident was a leaking brake system.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record ANC99LA137
- Event ID
- 20001212X19664
- Case number
- ANC99LA137
- 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 1999-09-09.
- API snapshot SHA-256: e7c3c37965a639031c63fa32fc7c8811027fe498e514bb96a805f846b22b4d16; retrieved 2026-09-22T14:11:48.374Z.