# NTSB FTW70IF075: Boeing 727, N1991, Oklahoma Cty, OK, May 19, 1970

- Type: NTSB incident investigation
- Classification: Incident · No injuries · Closed
- Date: May 19, 1970
- Place: Oklahoma Cty, OK · OKLAHOMA CTY, OK
- Location: 35.4676° N, 97.5164° W: Placed by OpenAirDocs: center of Oklahoma City, OK, within about 14 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=35.4676&lon=-97.5164&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 56 uninjured
- Status: Completed, report September 10, 1970
- Report: Brief approved by the director
- NTSB case key (mKey): 121544
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW70IF075
- Page: https://openairdocs.org/ntsb/FTW70IF075

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
4-0029  70/5/19  NR.OKLAHOMA CTY,OKLA  BOEING 727          CR-  0  0  6  SCHED DOM PASSG SRV       CERTIFICATE UNKNOWN, AGE
        TIME - 1200                    N1991               PX-  0  0 50                            UNK/NR, UNK/NR TOTAL
                                       DAMAGE-NONE         OT-  0  0  0                            HOURS, UNK/NR IN TYPE,
                                                                                                   UNK/NR INSTRUMENT RATED.
        CLASSIFIED AS INCIDENT
        OPERATOR - AMERICAN AIRLINES,INC.
        DEPARTURE POINT             INTENDED DESTINATION         LAST ENROUTE STOP
          NEW YORK,NY                 LOS ANGELES,CALIF           OKLAHOMA CTY,OKLA
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           MISCELLANEOUS                                            IN FLIGHT: CLIMB TO CRUISE
        PROBABLE CAUSE(S)
           PERSONNEL - FLIGHT ENGINEER: OTHER
        REMARKS- FLT ENGINEER BECAME INCAPACITATED. RET TO OKLA CITY AND LND.
```

## Aircraft

- Registration: [N1991](https://openairdocs.org/deregistered/N1991-1994-11-22), registration cancelled 1994-11-22, S/N 18447 (OpenAirDocs)
- Reported make and model: BOEING 727
- Registry model: [Boeing 727-23](https://openairdocs.org/model/boeing-727-23) (registry code 1384004) (OpenAirDocs)
- Category: Airplane
- Engines: turbo fan
- Damage: No damage

## Other investigations on N1991 (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 LAX71IL044](https://openairdocs.org/ntsb/LAX71IL044), Jan 2, 1971: Boeing 727 (N1991), Imperial, CA, incident, no damage

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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