# NTSB NYC79DA041: Boeing 727, N6821, Philadelphia, PA, April 19, 1979

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: April 19, 1979
- Place: Philadelphia, PA · PHILADELPHIA, PA
- Location: 39.9523° N, 75.1638° W: Placed by OpenAirDocs: center of Philadelphia, PA, within about 7 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=39.9523&lon=-75.1638&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 71 uninjured
- Status: Completed, report September 25, 1980
- Report: Brief approved by the director
- NTSB case key (mKey): 136503
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=NYC79DA041
- Page: https://openairdocs.org/ntsb/NYC79DA041

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
1-0032  79/4/19    PHILADELPHIA,PA     BOEING 727          CR-  0  0  6  SCHED DOM PASSG SRV       AIRLINE TRANSPORT, AGE
        TIME - 1253                    N6821               PX-  0  0 65                            45, 11414 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            3372 IN TYPE, INSTRUMENT
                                                                                                   RATED.
        NAME OF AIRPORT - PHILADELPHIA INTL
        OPERATOR - AMERICAN AIRLINES,INC.
        DEPARTURE POINT             INTENDED DESTINATION
          HOUSTON,TX                  PHILADELPHIA,PA
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           HARD LANDING                                             LANDING: LEVEL OFF/TOUCHDOWN
        PROBABLE CAUSE(S)
           COPILOT - IMPROPER OPERATION OF FLIGHT CONTROLS
           COPILOT - IMPROPER OPERATION OF POWERPLANT & POWERPLANT CONTROLS
        REMARKS- WIND GUSTS TO 19 KTS.
```

## Aircraft

- Registration: [N6821](https://openairdocs.org/deregistered/N6821-2007-05-19), registration cancelled 2007-05-19, S/N 19496, built 1968 (OpenAirDocs)
- Reported make and model: BOEING 727
- Registry model: [Boeing 727-223](https://openairdocs.org/model/boeing-727-223) (registry code 1384074) (OpenAirDocs)
- Registry engine: [Pratt & Whitney JT8D-1](https://openairdocs.org/engine/pratt-whitney-jt8d-1) (registry code 52044, turbo-jet) (OpenAirDocs)
- Category: Airplane
- Engines: turbo fan
- Damage: Substantial damage
- Airport: Philadelphia Intl

## Other investigations on N6821 (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 CHI91IA058](https://openairdocs.org/ntsb/CHI91IA058), Jan 4, 1991: Boeing B727-223 (N6821), Des Moines, IA, incident, no damage. Probable cause: AN OIL LEAK ORIGINATING FROM THE AUXILIARY POWER UNIT WHICH CREATED SMOKE IN THE PASSENGER CABIN AFTER IT PASSED THROUGH THE AIR CONDITIONING/HEATING SYSTEM EQUIPMENT AND ASSOCIATED DUCT WORK.

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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