Individually Owned: 150,657
Corporate Owned: 137,281
Unalaska Airport
Aircraft Accident/Incident Report
Unalaska, Alaska 99685
Sunday, April 4, 2004 17:15 AKD
NTSB Narrative Summary Released at Completion of Accident
A recently qualified captain was landing an amphibious, tailwheel airplane in a near direct crosswind of 7 gusting to 14 knots on a hard-surfaced runway at the conclusion of a scheduled commuter airline flight. The new captain (second pilot) was being observed and trained by the pilot-in-command check airman, who occupied the right seat pilot station. The right seat station was equipped with all flight controls, but did not have brake pedals. During the landing roll, the airplane ground looped to the right, and the left main landing gear collapsed, resulting in substantial damage to the fuselage. A review of the second pilot's training records and interviews with FAA personnel, disclosed that the second pilot had not received adequate transition training to the accident type airplane, and had a total of 1.8 hours in the accident type airplane at the time of the accident, which included all training and a flight check. The second pilot had accrued about 7 hours of tailwheel experience over 7 years prior to beginning his training on the accident type airplane. His received only 3 wheel landings, instead of the minimum of 12, in the accident type airplane during his transition training. Postaccident inspection of the airplane and maintenance records disclosed no evidence of any preaccident mechanical problems.
NTSB Probable Cause Narrative
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 substantial damage to the airplane. Factors associated with the accident are the second pilot's improper upgrade/transition training by the company check airman, the second pilot's lack of experience in the accident type airplane, the operator's lack of surveillance of the training process, and a crosswind.
Event Information
| Type of Event | Accident |
| Event Date | 4/4/2004 |
| Event Day of the Week | Sunday |
| Time of Event | 1715 |
| Event Time Zone | -- |
| Event City | Unalaska |
| Event State | ALASKA |
| Event Country | -- |
| Zipcode of the event site | 99685 |
| Event Date Year | 2004 |
| Event Date Month | 4 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | 535401N |
| Event Location Longitude | 1663237W |
| Event Location Airport | Unalaska |
| Event Location Nearest Airport ID | DUT |
| Indicates whether the acc/inc occurred off or on an airport | On Airport |
| Distance from airport in statute miles | -- |
| Degrees magnetic from airport | -- |
| Airport Elevation | -- |
| Weather Briefing Completeness | Unknown |
| Investigator's weather source | Weather Observation Facility |
| Time of the weather observation | 1716 Atlantic Daylight Time |
| Direction of event from weather observation facility (degrees) | -- |
| Weather Observation Facility ID | PADU |
| Elevation of weather observation facility | 22 |
| Distance of event from weather observation facility (units?) | -- |
| Time Zone of the weather observation | ADT |
| Lighting Conditions | Day |
| Lowest Ceiling Height | 2000 |
| Lowest Non-Ceiling Height | 1500 |
| Sky/Lowest/Cloud Conditions | Scattered |
| Sky Condition for Lowest Ceiling | Broken |
| Visibility Runway Visual Range (Feet) | -- |
| Visibility Runway Visual Value (Statute Miles) | -- |
| Visibility (Statute Miles) | 7 |
| Air Temperature at event time (in degrees celsius) | 2 |
| Dew Point at event time (in degress fahrenheit) | 6 |
| Wind Direction (degrees magnetic) | 27 |
| Variable Wind Indicator | Wind direction could be determined |
| Wind Speed (knots) | 7 |
| Wind Velocity Indicator | -- |
| Wind Gust Indicator | Gusting |
| Wind Gust (knots) | 14 |
| Altimeter Setting at event time (in. Hg) | 29.13 |
| Density Altitude (feet) | -- |
| Intensity of Precipitation | -- |
| METAR weather report | -- |
| Event Highest Injury | None |
| On Ground, Fatal Injuries | -- |
| On Ground, Minor Injuries | -- |
| On Ground, Serious Injuries | -- |
| Injury Total Fatal | -- |
| Injury Total Minor | -- |
| Injury Total None | 9 |
| Injury Total Serious | -- |
| Injury Total All | -- |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 16211 |
| NTSB Notification Source | FAA ROC |
| NTSB Notification Date | Apr 4 2004 12:00AM |
| NTSB Notification Time | 1805 |
| Fiche Number and/or location -used to find docket information | DMS |
| Date of most recent change to record | Sep 29 2004 1:02PM |
| User who most recently changed record | NTSB\MONR |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | Anchorage |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N22932 |
| NTSB Number | ANC04LA038 |
| Missing Aircraft Indicator | -- |
| Federal Aviation Reg. Part | Part 135: Air Taxi & Commuter |
| Type of Flight Plan filed | VFR |
| Flight plan Was Activated? | Yes |
| Damage | Substantial |
| Aircraft Fire | None |
| Aircraft Explosion | None |
| Aircraft Manufacturer's Full Name | Grumman |
| Aircraft Model | G21 |
| Aircraft Series Identifier | -- |
| Aircraft Serial Number | B-139 |
| Certified Max Gross Weight | 8920 |
| Aircraft Category | Airplane |
| Aircraft Registration Class | U.S. Registered/U.S. Soil |
| Aircraft is a homebuilt? | No |
| Flight Crew Seats | -- |
| Cabin Crew Seats | -- |
| Passenger Seats | -- |
| Total number of seats on the aircraft | 9 |
| Number of Engines | 2 |
| Fixed gear or retractable gear | Retractable |
| Aircraft, Type of Last Inspection | AAIP |
| Date of Last Inspection | Feb 9 2004 12:00AM |
| Airframe hours since last inspection | 30 |
| Airframe Hours | 16220 |
| ELT Installed | Yes |
| ELT Activated | No |
| ELT Aided Location of Event Site | No |
| ELT Type | -- |
| Aircraft Owner Name | Peninsula Airways, Inc. |
| Aircraft Owner Street Address | 6100 Boeing Avenue |
| Aircraft Owner City | Anchorage |
| Aircraft Owner State | AK |
| Aircraft Owner Country | USA |
| Aircraft Owner Zipcode | 99502 |
| Operator is an individual? | No |
| Operator Name | -- |
| Operator Same as Owner? | Yes |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | Yes |
| Operator Street Address | -- |
| Operator City | -- |
| Operator State | -- |
| Operator Country | -- |
| Operator Zip code | -- |
| Operator Code | PNSA |
| Owner has at least one certificate | -- |
| Other Operator of large aircraft? | -- |
| Certified for Part 133 or 137 Operation | -- |
| Operator Certificate Number | -- |
| Indicates whether an air carrier operation was scheduled or not | Scheduled |
| Indicates Domestic or International Flight | Domestic |
| Operator carrying Pax/Cargo/Mail | Passenger Only |
| Type of Flying (Per_Bus / Primary) | -- |
| Second Pilot on Board | Yes |
| Departure Point Same as Event | No |
| Departure Airport Code | KQA |
| Departure City | Akutan |
| Departure State | AK |
| Departure Country | USA |
| Departure Time | 1645 |
| Departure Time Zone | ADT |
| Destination Same as Local Flt | crash at destination city |
| Destination Airport Code | DUT |
| Destination City | -- |
| Destination State | -- |
| Destination Country | -- |
| Specific Phase of Flight | Landing - roll |
| Report sent to ICAO? | Yes |
| Evacuation occurred | No |
| Date of most recent change to record | Aug 5 2004 2:25PM |
| User who most recently changed record | PETL |
| Since inspection or accident | Last Inspection |
| Event Location Runway Number and Location | 30 |
| Runway Length | 3900 |
| Runway Width | 100 |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |