# NTSB ANC74AA044: Piper PA-18, N3872Z, Anchorage, AK, November 12, 1973

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Closed
- Date: November 12, 1973
- Place: Anchorage, AK · ANCHORAGE, AK
- Location: 61.2181° N, 149.9003° W: Placed by OpenAirDocs: center of Anchorage, AK, within about 23 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=61.2181&lon=-149.9003&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 2 serious, 3 minor
- Status: Completed, report March 15, 1974
- Report: Brief approved by the director
- NTSB case key (mKey): 187853
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC74AA044
- Page: https://openairdocs.org/ntsb/ANC74AA044

## NTSB brief (aircraft 2)

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3939  73/11/12   ANCHORAGE,ALAS      PIPER PA-20         CR-  0  0  1  MISCELLANEOUS             COMMERCIAL, AGE 45, 3000
        TIME - 0833                    N6936K              PX-  0  1  1  HUNTING                   TOTAL HOURS, 83 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  1  1                            NOT INSTRUMENT RATED.
        NAME OF AIRPORT - LK HOOD SEADROME
        DEPARTURE POINT             INTENDED DESTINATION
          ANCHORAGE,ALAS              SKWENTNA,ALAS
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLISION WITH AIRCRAFT: BOTH IN FLIGHT                  TAKEOFF: INITIAL CLIMB
        PROBABLE CAUSE(S)
           PERSONNEL - MISCELLANEOUS-PERSONNEL: PILOT OF OTHER AIRCRAFT
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - SUNGLARE
         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 - UNCONTROLLED AIRPORT
          CONTROL ZONE/AREA - YES                                  CONVERGENCE ANGLE-DEGREES -  90
          EVASIVE ACTION TAKEN - NO                                ANTI-COLLISION LIGHTS - INSTALLED,OPERATION UNKNOWN
        REMARKS- SEADROME CLOSED DUE STATE OF FRZN SEALANE.FLT OPS AT PLTS OWN RISK,TWR ADVISORY ONLY.TKOF TO EAST.
```

## NTSB brief (aircraft 1)

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3939  73/11/12   ANCHORAGE,ALAS      PIPER PA-18         CR-  0  0  1  MISCELLANEOUS             COMMERCIAL, AGE 34, 1800
        TIME - 0833                    N3872Z              PX-  0  1  0  HUNTING                   TOTAL HOURS, 275 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  1  2                            NOT INSTRUMENT RATED.
        NAME OF AIRPORT - LK HOOD SEADROME
        DEPARTURE POINT             INTENDED DESTINATION
          ANCHORAGE,ALAS              KENAI PENINSULA,ALAS
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLISION WITH AIRCRAFT: BOTH IN FLIGHT                  TAKEOFF: INITIAL CLIMB
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - EXERCISED POOR JUDGMENT
           PILOT IN COMMAND - FAILED TO SEE AND AVOID OTHER AIRCRAFT
        FACTOR(S)
           PILOT IN COMMAND - INADEQUATE PREFLIGHT PREPARATION AND/OR PLANNING
           PILOT IN COMMAND - FAILED TO FOLLOW APPROVED PROCEDURES,DIRECTIVES,ETC.
         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 - UNCONTROLLED AIRPORT
          CONTROL ZONE/AREA - YES                                  CONVERGENCE ANGLE-DEGREES -  90
          EVASIVE ACTION TAKEN - YES                               ANTI-COLLISION LIGHTS - INSTALLED,OPERATION UNKNOWN
        REMARKS- RADIOS NOT WARMED UP,NO 2-WAY COMM WITH TWR.TKOF INTO CONTROL ZONE.
```

## Aircraft 1

- Registration: [N3872Z](https://openairdocs.org/aircraft/N3872Z), registered now, S/N 18-7657, built 1961 (OpenAirDocs)
- Reported make and model: PIPER PA-18
- Registry model: [Piper PA-18-150](https://openairdocs.org/model/piper-pa-18-150) (registry code 7101828) (OpenAirDocs)
- Registry engine: [Lycoming 0-320 series](https://openairdocs.org/engine/lycoming-0-320-series) (registry code 41508, reciprocating) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Lk Hood Seadrome

## Aircraft 2

- Registration: [N6936K](https://openairdocs.org/aircraft/N6936K), registered now, S/N 20-38, built 1950 (OpenAirDocs)
- Reported make and model: PIPER PA-20
- Registry model: [Piper PA-20](https://openairdocs.org/model/piper-pa-20) (registry code 7102002) (OpenAirDocs)
- Registry engine: [Lycoming 0-290 series](https://openairdocs.org/engine/lycoming-0-290-series) (registry code 41506, 4 cycle) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Lk Hood Seadrome

## 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 19731112040661A](https://openairdocs.org/incident/19731112040661A), Nov 12, 1973: Piper PA18150, Anchorage, AK, Substantial damage. Radios not warmed up,no 2-WAY comm with twr. Tkof into control zone.

## Other investigations on N3872Z (5)

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 GAA18CA497](https://openairdocs.org/ntsb/GAA18CA497), Aug 18, 2018: Piper PA18 (N3872Z), Stony RIver, AK, substantial damage. Probable cause: The pilot's selection of unsuitable terrain for landing, which resulted in a nose-over.
- [NTSB ANC77DAH40](https://openairdocs.org/ntsb/ANC77DAH40), Sep 18, 1977: Piper PA-18 (N3872Z), Anchorage, AK, substantial damage
- [NTSB ANC77DAG22](https://openairdocs.org/ntsb/ANC77DAG22), Oct 9, 1976: Piper PA-18 (N3872Z), Anchorage, AK, substantial damage
- [NTSB ANC69D0051](https://openairdocs.org/ntsb/ANC69D0051), Jul 8, 1968: Piper PA-18 (N3872Z), Whittier, AK, substantial damage
- [NTSB ANC68D0061](https://openairdocs.org/ntsb/ANC68D0061), Sep 28, 1967: Piper PA-18 (N3872Z), Paxson, AK, substantial 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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