# NTSB CHI84LA275: North American P-51 Mustang X, N21770, Indianapolis, IN, July 1, 1984

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: July 1, 1984, 10:30 local (15:30 UTC)
- Place: Indianapolis, IN
- Location: 39.7684° N, 86.1580° W: Placed by OpenAirDocs: center of Indianapolis, IN, within about 11 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=39.7684&lon=-86.1580&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): 12682
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI84LA275
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/12682/pdf
- Page: https://openairdocs.org/ntsb/CHI84LA275

## Sequence of events

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

- Hard landing, landing - flare/touchdown
  - flare - misjudged, pilot in command (cause)
  - lack of total experience in kind of aircraft, pilot in command (contributing factor)
- Gear collapsed, landing - flare/touchdown
  - landing gear,main gear - overload

## Analysis

A BOUNCED LANDING OCCURED DURING WHICH THE LEFT MAIN GEAR COLLAPSED FOLLOWED BY A GROUND LOOP.

## Aircraft

- Registration: [N21770](https://openairdocs.org/deregistered/N21770-2013-08-08), registration cancelled 2013-08-08, S/N AEA 1, built 1983 (OpenAirDocs)
- Reported make and model: NORTH AMERICAN P-51 MUSTANG X (P-51 MUSTA)
- Registry model: [Aircraft Enterprises Assoc P-51 MUSTANG X](https://openairdocs.org/model/aircraft-enterprises-assoc-p-51-mustang-x) (registry code 1690462) (OpenAirDocs)
- Registry engine: [Fairchild V-770B series](https://openairdocs.org/engine/fairchild-v-770b-series) (registry code 26004, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: AEA-1
- Airframe hours: 15
- Engines: RANGER V770 reciprocating
- Damage: Substantial damage
- Flight: Business, Part 91
- Registered owner: Joseph J. Underwood
- Airworthiness certificate: Special, Experimental (Special)
- Last inspection: Annual, February 20, 1984, 46 hours before
- Departed: 21N2, INDIANAPOLIS, IN
- Airport: 21N2, Mt. Comfort, runway 25, 5,500 × 100 ft, concrete

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 54; private; airplane ratings: single-engine land, multi-engine land; medical: class 3, valid medical--w/ waivers/lim; seat: center; flight hours: 15 in this make and model

## Weather

- Conditions: Visual (VMC), Day
- Wind: 20° at 4 knots
- Visibility: 5 statute miles
- Lowest ceiling: 25,000 ft overcast
- Temperature: 72 °F, dew point 61 °F
- Altimeter: 30.00 inHg
- Observed at: IND, 20 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 19840701028139A](https://openairdocs.org/incident/19840701028139A), Jul 1, 1984: Amtr P51MUSTANGX, Indianapolis, IN, Substantial damage. Pilot lost directional control and ground looped aircraft during landing.

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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