# NTSB MKC84LA003: Piper PA-22-150, N6951D, Derby, KS, October 5, 1983

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: October 5, 1983, 16:15 local (21:15 UTC)
- Place: Derby, KS
- Location: 37.5654° N, 97.1746° W: Placed by OpenAirDocs at COOK AIRFIELD (K50), within about a mile (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=37.5654&lon=-97.1746&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 33578
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC84LA003
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/33578/pdf
- Page: https://openairdocs.org/ntsb/MKC84LA003

## Sequence of events

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

- Airframe/component/system failure/malfunction, landing - roll
  - hydraulic system,seal - other (cause)
  - maintenance,installation - improper, other maintenance personnel (cause)
  - landing gear,normal brake system - leak (cause)
  - fluid,hydraulic - exhaustion (cause)
  - landing gear,normal brake system - inoperative (contributing factor)
- Overrun, landing - roll
- On ground/water encounter with terrain/water, landing - roll
  - terrain condition - hidden obstruction(s) (contributing factor)
  - terrain condition - ditch (contributing factor)
- Nose gear collapsed, landing - roll
  - landing gear,nose gear - overload (contributing factor)
- Nose over, landing - roll

## Analysis

THE PLT WAS PACTICING LANDINGS & STOPPED AFTER EACH TOUCHDOWN. AFTER APRX THE 5TH LANDING, THE BRAKES FAILED TO OPERATE & THE ACFT CONTINUED OFF THE END OF THE RWY. BEFORE STOPPING, THE NOSE GEAR WENT IN A DITCH & COLLAPSED, AND THE ACFT NOSED OVER. THE PLT STATED THAT HE COULD NOT SEE THE DITCH BEFORE THE ENCOUNTER SINCE IT WAS COVERED WITH VEGETATION (GRASS). AN INVESTIGATION REVEALED THAT THE LEFT BRAKE BLEEDER PORT O-RING WAS IMPROPERLY SEATED ALLOWED HYDRAULIC FLUID TO LEAK WITH EACH APPLICATION OF THE BRAKES. THE HYDRAULIC RESERVOIR WAS FOUND TO BE EMPTY.

## Aircraft

- Registration: [N6951D](https://openairdocs.org/deregistered/N6951D-2013-05-02), registration cancelled 2013-05-02, S/N 22-4880, built 1957 (OpenAirDocs)
- Reported make and model: PIPER PA-22-150
- Registry model: [Piper PA-22-150](https://openairdocs.org/model/piper-pa-22-150) (registry code 7102210) (OpenAirDocs)
- Registry engine: [Lycoming 0-320 series](https://openairdocs.org/engine/lycoming-0-320-series) (registry code 41508, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 22-4880
- Airframe hours: 2924
- Engines: LYCOMING O-320-AIA 150 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: Donald P. Branine
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, April 22, 1983, 10 hours before
- Airport: K50, Cook Airfield, runway 18, 2,490 × 40 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 44; private; airplane ratings: single-engine land; medical: class 3, valid medical--no waivers/lim.; seat: left; flight hours: 200 total, 70 in this make and model, 200 as pilot in command, 6 in the last 90 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 250° at 5 knots
- Visibility: 20 statute miles
- Lowest ceiling: none
- Temperature: 82 °F, dew point 43 °F
- Altimeter: 30.00 inHg
- Observed at: ICT, 7 nm away

## 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 19831005060559A](https://openairdocs.org/incident/19831005060559A), Oct 5, 1983: Piper PA22150, Derby, KS, Substantial damage. Brakes failed on landing. Ran off end of runway and overturned in a ditch. Left brake o ring not seated. Leaked.

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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