# NTSB ANC93LA058: Piper PA-18, N82231, Chugiak, AK, May 3, 1993

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: May 2, 1993, 21:30 local (May 3, 1993, 05:30 UTC)
- Place: Chugiak, AK
- Coordinates: 61.410537, -149.169464 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=61.4105&lon=-149.1695&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report September 26, 1994
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 5872
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC93LA058
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/5872/pdf
- Page: https://openairdocs.org/ntsb/ANC93LA058

## Probable cause

THE FAILURE OF THE RIGHT BRAKE DUE TO IMPROPER INSTALLATION OF THE BRAKE LINE. FACTORS WERE THE PILOT'S IMPROPER IN FLIGHT PLANNING/DECISION BY NOT CHECKING THE BRAKES PRIOR TO LANDING, AND THE BERM.

## Sequence of events

In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf).

- Airframe/component/system failure/malfunction, landing - roll
  - landing gear,normal brake system - failure,partial (cause)
  - fluid,hydraulic - leak
  - in-flight planning/decision - improper, pilot in command (contributing factor)
  - maintenance,installation - improper, copilot/second pilot
- On ground/water encounter with terrain/water, landing - roll
  - terrain condition - berm (contributing factor)

## Analysis

AFTER TOUCHDOWN ON THE GRAVEL RUNWAY, THE PILOT APPLIED BRAKES AND FOUND THE RIGHT BRAKE INOPERATIVE.  THE AIRPLANE VEERED OFF THE LEFT SIDE OF THE RUNWAY AND COLLIDED WITH A BERM.  THE PILOT SAID HE DID NOT CHECK THE BRAKES PRIOR TO LANDING.  POST ACCIDENT EXAMINATION FOUND THAT MOST OF THE HYDRAULIC BRAKE FLUID HAD DRAINED OUT OF THE RIGHT BRAKE SYSTEM FROM AN IMPROPERLY FLARED LINE AT THE RIGHT BRAKE ASSEMBLY.

## Aircraft

- Registration: N82231 (not matched to a registry record)
- Reported make and model: PIPER PA-18
- Category: Airplane
- Serial number: 18-7907076
- Engines: LYCOMING O-320-A2B 150 horsepower reciprocating
- Damage: Substantial damage
- Flight: Business, Part 91
- Operator: Mayeur, Clint
- Registered owner: Vrem, Tracy J.
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, March 1, 1993, 50 hours before
- Departed: DLG, DILLINGHAM, AK
- Airport: Z15, Birchwood, runway 1, 2,500 × 50 ft, gravel

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 30; private; airplane ratings: single-engine land; medical: class 2, valid medical--no waivers/lim.; seat: front; flight hours: 3,100 total, 300 in this make and model, 3,000 as pilot in command, 60 in the last 90 days, 60 in the last 30 days, 14 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: calm
- Visibility: 60 statute miles
- Lowest ceiling: none
- Temperature: 55 °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).

- [Accident 19930502011569A](https://openairdocs.org/incident/19930502011569A), May 2, 1993: Piper PA18150, Birchwood, AK, Substantial damage. Right brake failed on rollout. Veered off runway. Hit berm. Brake line leaking at fitting. Lost all brake fluid.

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.

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