ANC93IA087

NTSB incident investigation · PZL Warzawa-Okecie PZL-104 Wilga 80 · Haines, AK · June 12, 1993

Incident · No injuriesIncident investigationFinal report
Date
June 12, 1993, 08:30 local (12:30 UTC)
Place
Haines, AK
Injuries
1 uninjured
Damage
No damage
Phase of flight
Taxi
Aircraft
N909CCPZL Warzawa-Okecie PZL-104 Wilga 80
Weather
Visual (VMC) · Day
Status
Completed · report December 2, 1994
Report
Approved by Office Director
NTSB office
Alaska Regional Office
FAA report
19930612029139A
Case key
2321

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the incident.

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Probable cause

The parking brake failure due to a broken bracket; intentionally leaving the airplane unattended with the engine running by the pilot-in-command; and the improper planning and decision of the pilot-in-command by not using wheel chocks.

Sequence of events

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

On ground/water collision with objectTaxi
Landing gear,parking brake - failure,partialCause
Aircraft unattended/engine(s) running - intentionalPilot in commandCause
Planning/decision - improperPilot in commandCause

Analysis

According to the pilot, one side of the bracket that holds the parking brake handle in the on position broke and partly released the brakes. The airplane taxied away while the pilot was putting a compressed air tank in his truck. The airplane struck a parked airplane before the pilot stopped the taxiing airplane with a rope. He was not using wheel chocks.

Factual narrative

On June 12, 1993, at 0830 Alaska daylight time, a wheel equipped Wilga 80 airplane, N909CC, registered to David Meyers of Memphis, TN, and operated by the Pilot-in-Command, slipped from its parking brake and ran into a parked Cessna 170 airplane, N2599C, registered to Ron Smith of Haines, Alaska. The business flight, operating under 14 CFR Part 91 for the purpose of fish guiding, was departing Haines, and the destination was Excursion Inlet, Alaska. The Private certificated Pilot-in-Command was not in the cockpit and was not injured. The airplane was not damaged, however, N2599C, received substantial damage.

According to the Pilot-in-Command, the engine on the Wilga uses a compressed air start system and he had to use an external compressed air source. He used a dive tank and after starting the airplane he exited the cockpit and disconnected the external compressed air source. He was loading the dive tank into his pickup when the airplane began moving.

According to the Pilot, the parking brake is a handle attached to a cable and the handle is pulled out and placed on a bracket to hold the parking brake on. One side of the bracket broke and allowed the cable to retract and release the brakes.

The airplane struck a parked airplane before the Pilot was able to catch and stop the airplane with a rope. The Pilot stated he was not using wheel chocks.

Aircraft

Registration
N909CC
Reported as
PZL Warzawa-Okecie PZL-104 Wilga 80 (PZL-104 WI)
Category
Airplane
Serial number
CFI9850831
Engine
Unknown UNKNOWN, unknown
Damage
No damage
Flight
Business · Part 91
Operator
Martin, Ronald L.
Registered owner
Meyer, David
Airworthiness certificate
Standard, Normal
Destination
Excursion Inlet, AK
Airport
HNS · Haines

Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
51
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 2, Valid Medical--w/ waivers/lim
Flight hours
9,000 total · 30 in the last 90 days

Weather

Conditions
Visual (VMC) · Day
Visibility
30 statute miles
Lowest ceiling
None
Temperature
61 °F, dew point -0 °F

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.