# NTSB ANC93IA026: Grumman G-21A, N22932, Akutan, AK, January 7, 1993 - Type: NTSB incident investigation - Classification: Incident · No injuries · Incident investigation · Final report - Date: January 7, 1993, 15:30 local (19:30 UTC) - Place: Akutan, AK - Coordinates: 54.119857, -165.830291 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=54.1199&lon=-165.8303&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 8 uninjured - Status: Completed, report December 3, 1993 - Report: Approved by Office Director - NTSB office: Alaska Regional Office - NTSB case key (mKey): 5840 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC93IA026 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/5840/pdf - Page: https://openairdocs.org/ntsb/ANC93IA026 ## Probable cause THE INCIDENT WAS CAUSED BY THE PILOTS IMPROPER COMPENSATION FOR THE WINDS. FACTORS WERE THE MICROBURST, THE ROUGH WATER, AND THE PILOT'S INADEQUATE EVALUATION OF THE WEATHER CONDITIONS. ## Analysis THE PILOT STATED THAT JUST AFTER TOUCHING DOWN ON THE WATER, HE ENCOUNTERED A MICROBURST. HE ESTIMATED THAT THE WIND SPEED SUDDENLY CHANGED FROM ABOUT 15 TO 20 KNOTS TO 40 TO 50 KNOTS. THE LEFT WING FLOAT HIT THE WATER AND WAS TORN OFF. BECAUSE OF THE STRONG WINDS AND ROUGH WATER HE WAS UNABLE TO GET AIRBORNE OR TO TURN THE AIRPLANE. HE KEPT THE AIRPLANE HEADED INTO THE WIND AND BEACHED THE AIRPLANE ON THE OPPOSITE SIDE OF THE BAY. THE PILOT ALSO SAID THAT SUITABLE WEATHER CONDITIONS HAD BEEN REPORTED FOR THE LANDING AREA ABOUT ONE HALF HOUR EARLIER. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Loss of control - on ground/water, landing - roll - weather condition - microburst/dry (contributing factor) - weather evaluation - inadequate, pilot in command (contributing factor) - compensation for wind conditions - improper, pilot in command (cause) - Dragged wing,rotor,pod,float or tail/skid, landing - roll - airport facilities,runway/landing area condition - water,rough (contributing factor) ## Aircraft - Registration: [N22932](https://openairdocs.org/aircraft/N22932), registered now, S/N B-139, built 1946 (OpenAirDocs) - Reported make and model: GRUMMAN G-21A - Registry model: [Grumman G-21A](https://openairdocs.org/model/grumman-g-21a) (registry code 3951204) (OpenAirDocs) - Registry engine: [Pratt & Whitney R-985 series](https://openairdocs.org/engine/pratt-whitney-r-985-series) (registry code 52008, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: B-139 - Airframe hours: 12054 - Engines: P&W R-985 450 horsepower reciprocating - Damage: Minor damage - Flight: Part 135 - Operator: Peninsula Airways, Inc. - Registered owner: Peninsula Airways, Inc. - Airworthiness certificate: Standard, Normal - Last inspection: 100 hour, January 7, 1993, 1 hours before - Departed: DUT, UNALASKA, AK - Flight plan: VFR ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 28; airline transport; airplane ratings: single-engine land, multi-engine sea, multi-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; seat: left; toxicology performed; flight hours: 7,076 total, 235 in this make and model, 6,953 as pilot in command, 131 in the last 90 days, 44 in the last 30 days, 1 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 120° at 15 knots, gusting 30 - Visibility: 5 statute miles - Lowest ceiling: 800 ft broken - Temperature: 36 °F ## FAA reports on this event (1) The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs). - [Incident 19930107000249I](https://openairdocs.org/incident/19930107000249I), Jan 7, 1993: Grumav G21A, Akutan, AK, Minor damage. On water landing pilot reported wind gust. Bounced. Aircraft then hit water with left wing low. Float broke off. ## Other investigations on N22932 (3) 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… - [NTSB ANC98LA038](https://openairdocs.org/ntsb/ANC98LA038), Apr 15, 1998: Grumman G-21 (N22932), Dutch Harbor, AK, substantial damage. Probable cause: The pilot-in-command's failure to identify the swells prior to landing. A factor was the water swells. - [NTSB LAX79FA084](https://openairdocs.org/ntsb/LAX79FA084), Sep 17, 1979: Grumman G-21A (N22932), Avalon, CA, substantial damage, 1 fatal 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. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.