# Accident 20090917049529A: Grumman G-44A, Anchorage, AK, September 17, 2009

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: September 17, 2009, 09:29 local time
- Place: Anchorage, AK
- Damage: Substantial damage
- Phase of flight: Landing: Rollout
- Operating rules: General operating rules (Part 91)
- Location: 61.2095° N, 149.8893° W: From the FAA
- Nearby events: https://openairdocs.org/map.md?lat=61.2095&lon=-149.8893&mi=10
- Aircraft: N86627, registered now (https://openairdocs.org/aircraft/N86627) (OpenAirDocs)
- Registry model: Grumman G-44A (registry code 3951508, https://openairdocs.org/model/grumman-g-44a) (OpenAirDocs)
- Registry engine: Continental I0-470 series (registry code 17027, https://openairdocs.org/engine/continental-i0-470-series) (OpenAirDocs)
- Reported make and model: GRUMMAN G-44A
- Reported engine: CONT MOTOR I0-470 SERIES
- People aboard: 2
- Fatal injuries: 0
- Other injuries: 0
- Pilot certificates: Commercial pilot
- Pilot flight hours: 3,550 total, 780 in this make and model, 20 in the last 90 days
- NTSB investigation: [NTSB ANC09LA100](https://openairdocs.org/ntsb/ANC09LA100) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/20090917049529A

## Narrative

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

ON 9-16-09, THE AIRCRAFT WAS FLOWN FOR A MAINTENANCE TEST FLIGHT AFTER MAINTENANCE ON SEVERAL ITEMS.  THE RH GEAR, OUTBOARD WHEEL HALF HAD BEEN REPLACED. THE BRAKE CYLINDERS HAD BEEN REBUILT WITH NEW GASKETS, AND NEW BRAKE PADS. REPAIRED SYSTEMS WERE GROUND TESTED AND MAINTENANCE DOCUMENTED BEFORE THE TEST FLIGHT. THE AIRCRAFT WAS TEST FLOWN BY THE PILOT WITH THE ASSOCIATED MECHANIC ON BOARD. THE AIRCRAFT LANDED ON RUNWAY 7, AND DURING BRAKING ON ROLLOUT, THE BRAKE ON THE RIGHT SIDE FAILED, THE PEDAL TO THE FLOOR. LOSS OF AIRCRAFT BRAKING CONTROL (RH) RESULTED IN A VEERING OFF THE RUNWAY TO THE SIDE GRASSY AREA AND  AN AIRCRAFT 270 DEGREE GROUND LOOP. THE AIRCRAFT DAMAGED THE RIGHT WINGTIP AREA, THE RIGHT WING PONTOON AND SUPPORTING STRUTS, AND THE RIGHT WING AILERON. INSPECTION OF THE FAILED RIGHT SIDE BRAKE SYSTEM REVEALED A FAILED, BROKEN BRAKE HOSE ATTACH FITTING, AN TO PIPE, 1/4 INCH, AN 823-4D, FAILED APPROX. 1 THREAD BELOW THE BRAKE CYLINDER OUTER SURFACE.

## 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 ANC09LA100](https://openairdocs.org/ntsb/ANC09LA100), Sep 17, 2009: Grumman G-44A (N86627), Anchorage, AK, substantial damage. Probable cause: A fatigue fracture of an unapproved hydraulic brake line fitting, which resulted in a loss of control during the landing roll. Contributing to the accident was the installation of an unapproved part…

## Other reports on N86627 (1)

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

- [Incident 20100606005489I](https://openairdocs.org/incident/20100606005489I), Jun 6, 2010: Grumman G-44A (N86627), Mukilteo, WA, No damage. [privacy data omitted] And PIC of N86627, a Grumman G44A executed an emergency landing on the water approximately 4 miles from the Mukilteo boat launch at 1:30…

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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