# NTSB LAX74AL083: Piper PA-34, N15774, Denver, CO, June 21, 1974

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Closed
- Date: June 21, 1974
- Place: Denver, CO · DENVER, CO
- Location: 39.7392° N, 104.9847° W: Placed by OpenAirDocs: center of Denver, CO, within about 7 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=39.7392&lon=-104.9847&mi=10
- Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 4 fatal, 1 minor, 1 uninjured
- Status: Completed, report September 26, 1974
- Report: Brief approved by the director
- NTSB case key (mKey): 130131
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX74AL083
- Page: https://openairdocs.org/ntsb/LAX74AL083

## NTSB brief (aircraft 2)

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2421  74/6/21    DENVER,COLO         BEECH M35           CR-  1  0  0  NONCOMMERCIAL             PRIVATE, AGE 46, 650
        TIME - 0837                    N9727R              PX-  3  0  0  PLEASURE/PERSONAL TRANSP  TOTAL HOURS, 250 IN TYPE,
                                       DAMAGE-DESTROYED    OT-  0  0  2                            NOT INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          WILLIAMS,ARIZ               BOULDER,COLO
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLISION WITH AIRCRAFT: BOTH IN FLIGHT                  IN FLIGHT: NORMAL CRUISE
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - FAILED TO SEE AND AVOID OTHER AIRCRAFT
           PERSONNEL - MISCELLANEOUS-PERSONNEL: PILOT OF OTHER AIRCRAFT
         SPECIAL DATA
          SEGMENTS OF AVIATION INVOLVED - SMALL US GEN.AV.-SMALL US GEN.AV.
          CONTROLLING AGENCY - NO CONTROL                          RADAR CTL/SURVEILLANCE - NOT UNDER RADAR CONTACT
          TRAFFIC ADVISORY ISSUED - NONE                           CONTROLLED/UNCONTROLLED AIRPORT - CONTROLLED AIRPORT
          CONTROL ZONE/AREA - NO                                   EVASIVE ACTION TAKEN - UNKNOWN/NOT REPORTED
          ANTI-COLLISION LIGHTS - INSTALLED,OPERATION UNKNOWN
         FIRE AFTER IMPACT
        REMARKS- NORTHBD.L WING PANEL SEVERED BY IMPACT WITH L PROP OF N15774.RADAR EQUIP FAILED TO DETECT N9727R.
```

## NTSB brief (aircraft 1)

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2421  74/6/21    DENVER,COLO         PIPER PA-34         CR-  0  0  2  INSTRUCTIONAL             COMMERCIAL, FL.INSTR.,
        TIME - 0837                    N15774              PX-  0  0  0  DUAL                      AGE 27, 4462 TOTAL HOURS,
                                       DAMAGE-DESTROYED    OT-  4  0  0                            7 IN TYPE, INSTRUMENT
                                                                                                   RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          DENVER,COLO                 LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLISION WITH AIRCRAFT: BOTH IN FLIGHT                  LANDING: INITIAL APPROACH
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - FAILED TO SEE AND AVOID OTHER AIRCRAFT
           PERSONNEL - MISCELLANEOUS-PERSONNEL: PILOT OF OTHER AIRCRAFT
         SPECIAL DATA
          SEGMENTS OF AVIATION INVOLVED - SMALL US GEN.AV.-SMALL US GEN.AV.
          CONTROLLING AGENCY - APPROACH CONTROL LANDING            RADAR CTL/SURVEILLANCE - UNDER RADAR CONTACT
          TRAFFIC ADVISORY ISSUED - NONE                           CONTROLLED/UNCONTROLLED AIRPORT - CONTROLLED AIRPORT
          CONTROL ZONE/AREA - NO                                   EVASIVE ACTION TAKEN - NO
          ANTI-COLLISION LIGHTS - INSTALLED,OPERATION UNKNOWN
        REMARKS- PRACTICE ILS BC RWY 8R APCH.PLT AT CTLS UNDER INST HOOD.CTLD BY DENVER TRACON.1 MILE OUTSIDE TCA.
```

## Aircraft 1

- Registration: [N15774](https://openairdocs.org/deregistered/N15774-1974-07-26), registration cancelled 1974-07-26, S/N 34-7450001, built 1972 (OpenAirDocs)
- Reported make and model: PIPER PA-34
- Registry model: [Piper PA-34-200](https://openairdocs.org/model/piper-pa-34-200) (registry code 7103405) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Destroyed
- Airport: Stapleton Intl

## Aircraft 2

- Registration: [N9727R](https://openairdocs.org/deregistered/N9727R-1974-12-31), registration cancelled 1974-12-31, S/N D-6172 (OpenAirDocs)
- Reported make and model: BEECH M35
- Registry model: [Beech M35](https://openairdocs.org/model/beech-m35) (registry code 1151526) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Destroyed

## 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 19740621037611A](https://openairdocs.org/incident/19740621037611A), Jun 21, 1974: Piper PA34200, Denver, CO, Destroyed. Practice ILS bc rwy 8R apch. Plt at ctls under inst hood. Ctld by Denver TRACON.1 mile outside tca.
- [Accident 19740621037612A](https://openairdocs.org/incident/19740621037612A), Jun 21, 1974: Beech M35, Denver, CO, Destroyed, 3 fatal. Northbd.l wing panel severed by impact with l prop of N15774.radar equip failed to detect N9727R.

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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