ANC90LA102 · Grumman G21
Grumman G21 · Accident: loss of control on ground/water during landing
From Port Heiden Airport (PTH) to an unrecorded destination
Event
- NTSB case
- ANC90LA102
- 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
- Government
- 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 G21
- Aircraft type
- Grumman G21
- 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
- N7811
- Operator
- Unknown
- Onboard fatalities
- Unknown
- Route
- From Port Heiden Airport (PTH), PORT HIEDEN, AKTo not recorded
- 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
- Public Aircraft
- 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
- Pilot in command › Compensation for wind conditions, inadequate
- Pilot in command › Directional control, not maintained
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
THE PILOT REPORTED DIRECTIONAL CONTROL PROBLEMS WHILE LANDING IN A CROSSWIND OF 70-80 DEGREES AT 15 KNOTS OR GREATER. THE AIRPLANE TOUCHED DOWN IN THE CENTER OF THE RUNWAY, BUT QUICKLY VEERED TO THE LEFT AND WENT OFF THE RUNWAY. AN AIR TRAFFIC CONTROLLER WHO WITNESSED THE ACCIDENT SAID THAT IT APPEARED THAT A GUST OF WIND CAUSED THE RIGHT WING TO RISE SHORTLY AFTER LANDING, AND THAT THE AIRPLANE THEN VEERED TO THE LEFT. AN EXAMINATION OF THE LEFT MAIN LANDING GEAR, TIRE, AND BRAKE ASSEMBLY DISCLOSED NO ANOMALIES WITH ANY OF THE SYSTEMS OR STRUCTURE.
Probable cause
THE PILOT FAILED TO ADEQUATELY COMPENSATE FOR THE PREVAILING WIND CONDITIONS AND HIS FAILURE TO MAINTAIN DIRECTIONAL CONTROL. A CONTRIBUTING FACTOR WAS THE STRONG CROSSWIND COMPONENT.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record ANC90LA102
- Event ID
- 20001212X23313
- Case number
- ANC90LA102
- 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 1990-06-30.
- API snapshot SHA-256: 8a28b33c7ce707721088ca425e2d21e3cb001ad18f59bd769d1aeecdc7afebcd; retrieved 2026-09-18T21:22:54.094Z.