# NTSB FTW74AF005: Boeing 727, N127, Yukon, OK, July 27, 1973

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Closed
- Date: July 27, 1973
- Place: Yukon, OK · YUKON, OK
- Location: 35.5184° N, 97.7662° W: Placed by OpenAirDocs: center of Yukon, OK, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=35.5184&lon=-97.7662&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 3 fatal, 4 uninjured
- Status: Completed, report February 6, 1974
- Report: Brief approved by the director
- NTSB case key (mKey): 188800
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW74AF005
- Page: https://openairdocs.org/ntsb/FTW74AF005

## NTSB brief (aircraft 2)

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3645  73/7/27    YUKON,OKLA          CESSNA 172K         CR-  1  0  0  NONCOMMERCIAL             PRIVATE, AGE 19, 71 TOTAL
        TIME - 1005                    N78297              PX-  2  0  0  PLEASURE/PERSONAL TRANSP  HOURS, 4 IN TYPE, NOT
                                       DAMAGE-DESTROYED    OT-  0  0  4                            INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          OKLAHOMA CITY,OKLA          LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLISION WITH AIRCRAFT: BOTH IN FLIGHT                  IN FLIGHT: NORMAL CRUISE
        PROBABLE CAUSE(S)
           PERSONNEL - MISCELLANEOUS-PERSONNEL: PILOT OF OTHER AIRCRAFT
        FACTOR(S)
           PILOT IN COMMAND - FAILED TO FOLLOW APPROVED PROCEDURES,DIRECTIVES,ETC.
           PERSONNEL - TRAFFIC CONTROL PERSONNEL: OTHER
         SPECIAL DATA
          SEGMENTS OF AVIATION INVOLVED - SMALL US GEN.AV.-LARGE US GEN.AV.
          CONTROLLING AGENCY - NO CONTROL                          RADAR CTL/SURVEILLANCE - NOT UNDER RADAR CONTACT
          TRAFFIC ADVISORY ISSUED - NONE                           CONTROLLED/UNCONTROLLED AIRPORT - CONTROLLED AIRPORT
          HORIZONTAL COLLISION ANGLE-DEGREES -   71                EVASIVE ACTION TAKEN - UNKNOWN/NOT REPORTED
        REMARKS- FAR 91.67 APPLIES.FLT CK INDICATED HOLES IN ATC RADAR SYSTEM.VSBY RESTRICTED BY HI WING.
```

## NTSB brief (aircraft 1)

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3645  73/7/27    YUKON,OKLA          BOEING 727          CR-  0  0  4  INSTRUCTIONAL             ATP,FLIGHT INSTR., AGE
        TIME - 1005                    N127                PX-  0  0  0  TRAINING                  50, 10255 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  3  0  0                            950 IN TYPE, INSTRUMENT
                                                                                                   RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          OKLAHOMA CITY,OKLA          LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLISION WITH AIRCRAFT: BOTH IN FLIGHT                  IN FLIGHT: DESCENDING
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - FAILED TO SEE AND AVOID OTHER AIRCRAFT
        FACTOR(S)
           PILOT IN COMMAND - FAILED TO FOLLOW APPROVED PROCEDURES,DIRECTIVES,ETC.
           PERSONNEL - TRAFFIC CONTROL PERSONNEL: OTHER
         SPECIAL DATA
          SEGMENTS OF AVIATION INVOLVED - SMALL US GEN.AV.-LARGE US GEN.AV.
          CONTROLLING AGENCY - APPROACH CONTROL LANDING            RADAR CTL/SURVEILLANCE - UNDER RADAR CONTACT
          TRAFFIC ADVISORY ISSUED - NONE                           CONTROLLED/UNCONTROLLED AIRPORT - CONTROLLED AIRPORT
          HORIZONTAL COLLISION ANGLE-DEGREES -   71                EVASIVE ACTION TAKEN - NO
          ANTI-COLLISION LIGHTS - OPERATING
        REMARKS- FAR 91.67 APPLIES.
```

## Aircraft 1

- Registration: N127 (not matched to a registry record)
- Reported make and model: BOEING 727
- Category: Airplane
- Engines: turbo fan
- Damage: Substantial damage
- Airport: Wiley Post

## Aircraft 2

- Registration: [N78297](https://openairdocs.org/deregistered/N78297-1973-12-21), registration cancelled 1973-12-21, S/N 17257557 (OpenAirDocs)
- Reported make and model: CESSNA 172K
- Registry model: [Cessna 172K](https://openairdocs.org/model/cessna-172k) (registry code 2072430) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Destroyed
- Airport: Wiley Post

## FAA reports on this event (2)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Accident 19730727035891A](https://openairdocs.org/incident/19730727035891A), Jul 27, 1973: Boeing 72761, Yukon, OK, Substantial damage. FAR 91.67 applies.
- [Accident 19730727035892A](https://openairdocs.org/incident/19730727035892A), Jul 27, 1973: Cessna 172D, Yukon, OK, Destroyed, 2 fatal. FAR 91.67 applies. Flt ck indicated holes in ATC radar system. Vsby restricted by hi wing.

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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