# Accident 20040404006449A: Grumav G21A, Unalaska, AK, April 4, 2004

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: April 4, 2004, 17:15 local time
- Place: Unalaska, AK
- Airport: Unalaska
- Damage: Substantial damage
- Phase of flight: Roll-Out (Fixed Wing)
- Operating rules: Air taxi and commuter (Part 135)
- Operator: PNSA
- Location: 53.9003° N, 166.5436° W: From the FAA
- Nearby events: https://openairdocs.org/map.md?lat=53.9003&lon=-166.5436&mi=10
- Aircraft: N22932, registered now (https://openairdocs.org/aircraft/N22932) (OpenAirDocs)
- Registry model: Grumman G-21A (registry code 3951204, https://openairdocs.org/model/grumman-g-21a) (OpenAirDocs)
- Registry engine: Pratt & Whitney R-985 series (registry code 52008, https://openairdocs.org/engine/pratt-whitney-r-985-series) (OpenAirDocs)
- Reported make and model: GRUMAV G21A
- Reported engine: PWA R985*
- People aboard: 9
- Fatal injuries: 0
- Pilot flight hours: 20,000 total, 3,500 in this make and model, 116 in the last 90 days
- NTSB investigation: [NTSB ANC04LA038](https://openairdocs.org/ntsb/ANC04LA038) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/20040404006449A

## Narrative

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

(-23) THE FLYING PILOT AT THE TIME OF THE ACCIDENT WAS THE SECOND-IN-COMMAND (SIC), ^PRIVACY DATA OMITTED^. ^PRIVACY DATA OMITTED^ HAD RECEIVED A 14 CFR, PART 135.293 & 135.299 PROFICIENCY/LINE CHECKRIDE THE SAME DAY AND JUST PRIOR TO THE ACCIDENT. A PNSA CHECK-AIRMAN, GUY MORGAN, WAS OBSERVING ^PRIVACY DATA OMITTED^ FROM THE RIGHT SEAT OF THE COCKPIT, WHILE ^PRIVACY DATA OMITTED^ CONDUCTED INITIAL OPERATING EXPERIENCE (IOE). THE ACCIDENT HAPPENED DURING THE SIC'S FIRST IOE FLIGHT. THE FLIGHT WAS DISPATCHED AS A 14 CFR, PART 135 COMMUTER FLIGHT FROM UNALASKA AIRPORT, TO AKUTAN, AND BACK. THERE WERE SEVEN PASSENGERS ONBOARD. UPON LANDING BACK AT UNALASKA, THE SIC LOST DIRECTIONAL CONTROL OF THE AIRCRAFT. THE LEFT GEAR LEG COLLAPSED, FOLLOWED BY SEPARATION OF A WING FLOAT, ALLOWING THE WING TO MAKE CONTACT WITH THE RUNWAY, RESULTING IN SUBSTANTIAL DAMAGE TO THE WING, HULL BOTTOM, AND RIGHT SIDE FUSELAGE. THERE WERE NO INJURIES. AT THE TIME OF THE ACCIDENT THE SIC HAD A TOTAL OF 3.8 HRS IN MAKE & MODEL, 3.8 HRS IN THE LAST 90 DAYS, AND ONLY THREE PREVIOUS LANDINGS IN THE AIRCRAFT. THE CHECK-AIRMAN OBSERVING THE FLIGHT HAD A CONTROL YOKE AND RUDDER PEDALS BUT NO BRAKES. THUS, HE DID NOT HAVE A FULLY FUNCTIONING SET OF CONTROLS.

## 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 ANC04LA038](https://openairdocs.org/ntsb/ANC04LA038), Apr 5, 2004: Grumman G21 (N22932), Unalaska, AK, substantial damage. Probable cause: The inadvertent ground loop/swerve by the second pilot during the landing roll, and the first (check) pilot's inadequate supervision of the second pilot, which resulted in a loss of control and…

## Other reports on N22932 (5)

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

- [Accident 19980415006889A](https://openairdocs.org/incident/19980415006889A), Apr 15, 1998: Grumav G21 (N22932), Unalaska, AK, Substantial damage. Unable land amphibian at dut. Landed on wataer to await clearing. Porpoised on a swell damaged horizontal stabilize. (From .4) the pilot landed the seaplane in…
- [Incident 19930107000249I](https://openairdocs.org/incident/19930107000249I), Jan 7, 1993: Grumav G21A (N22932), Akutan, AK, Minor damage. On water landing pilot reported wind gust. Bounced. Aircraft then hit water with left wing low. Float broke off.
- [Incident 19861107072769I](https://openairdocs.org/incident/19861107072769I), Nov 7, 1986: Grumav G21A (N22932), Kodiak, AK, Minor damage. During turn wing float submerged and float attachment fitting broke. Float separated and aircraft capsized.
- [Accident 19790917036239A](https://openairdocs.org/incident/19790917036239A), Sep 17, 1979: Gruman G21A (N22932), Catalina Island, CA, Substantial damage, 1 fatal. Elevator control cable parted just after liftoff. Amphibian hit water, nose down, sank.
- [Incident 19790307018879I](https://openairdocs.org/incident/19790307018879I), Mar 7, 1979: Grumav G21A (N22932), Long Beach, CA, Minor damage. Left engine quit, right engine ran intermittently during takeoff. Probable fuel cell design problem plus line clog.

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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