# NTSB FTW73AF016: Piper PA-18, N4612Y, Friendswood, TX, November 5, 1972

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: November 5, 1972
- Place: Friendswood, TX · FRIENDSWOOD, TX
- Location: 29.5077° N, 95.2006° W: Placed by OpenAirDocs: center of Friendswood, TX, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=29.5077&lon=-95.2006&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 4 uninjured
- Status: Completed, report March 29, 1973
- Report: Brief approved by the director
- NTSB case key (mKey): 169384
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW73AF016
- Page: https://openairdocs.org/ntsb/FTW73AF016

## NTSB brief (aircraft 2)

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3725   72/11/5   FRIENDSWOOD,TEX     BLANIK L-13         CR-  0  0  1  COMMERCIAL                COMMERCIAL, FL.INSTR.,
        TIME - 1230                    N711KR              PX-  0  0  1  MAPPING/PHOTO             AGE 51, 5000 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  2                            60 IN TYPE, NOT
                                                                                                   INSTRUMENT RATED.
        NAME OF AIRPORT - CLOVER
        DEPARTURE POINT             INTENDED DESTINATION
          FRIENDSWOOD,TEX             LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLISION WITH AIRCRAFT: BOTH IN FLIGHT                  IN FLIGHT: DESCENDING
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - FAILED TO FOLLOW APPROVED PROCEDURES,DIRECTIVES,ETC.
           PILOT IN COMMAND - MISJUDGED CLEARANCE
         SPECIAL DATA
          SEGMENTS OF AVIATION INVOLVED - SMALL US GEN.AV.-SMALL US GEN.AV.
          CONTROLLING AGENCY - NO CONTROL                          RADAR CTL/SURVEILLANCE - RADAR SERVICE NOT AVAILABLE
          TRAFFIC ADVISORY ISSUED - NONE                           CONTROLLED/UNCONTROLLED AIRPORT - UNCONTROLLED AIRPORT
          CONTROL ZONE/AREA - NO                                   HORIZONTAL COLLISION ANGLE-DEGREES -   0
          EVASIVE ACTION TAKEN - NO                                ANTI-COLLISION LIGHTS - NOT INSTALLED
        REMARKS- BOTH ACFT LND OK.
```

## NTSB brief (aircraft 1)

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3725   72/11/5   FRIENDSWOOD,TEX     PIPER PA-18         CR-  0  0  1  COMMERCIAL                COMMERCIAL, AGE 35, 536
        TIME - 1230                    N4612Y              PX-  0  0  1  MAPPING/PHOTO             TOTAL HOURS, 936 IN TYPE,
                                       DAMAGE-MINOR        OT-  0  0  2                            INSTRUMENT RATED.
        NAME OF AIRPORT - CLOVER
        DEPARTURE POINT             INTENDED DESTINATION
          FRIENDSWOOD,TEX             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
         SPECIAL DATA
          SEGMENTS OF AVIATION INVOLVED - SMALL US GEN.AV.-SMALL US GEN.AV.
          CONTROLLING AGENCY - NO CONTROL                          RADAR CTL/SURVEILLANCE - RADAR SERVICE NOT AVAILABLE
          TRAFFIC ADVISORY ISSUED - NONE                           CONTROLLED/UNCONTROLLED AIRPORT - UNCONTROLLED AIRPORT
          CONTROL ZONE/AREA - NO                                   HORIZONTAL COLLISION ANGLE-DEGREES -   0
          EVASIVE ACTION TAKEN - NO                                ANTI-COLLISION LIGHTS - NOT INSTALLED
        REMARKS- 2 SHIP FORMATION.GLIDER ON WG DESCENDED TO BREAK FORMATION.PIPER PROP HIT FIN & RUDDER OF GLIDER.
```

## Aircraft 1

- Registration: [N4612Y](https://openairdocs.org/aircraft/N4612Y), registered now, S/N 18-8933, built 1971 (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: Minor damage
- Airport: Clover

## Aircraft 2

- Registration: [N711KR](https://openairdocs.org/deregistered/N711KR-2012-06-28), registration cancelled 2012-06-28, S/N 175127, built 1972 (OpenAirDocs)
- Reported make and model: BLANIK L-13
- Registry model: [Let BLANIK L-13](https://openairdocs.org/model/let-blanik-l-13) (registry code 1360306) (OpenAirDocs)
- Registry engine: [NONE](https://openairdocs.org/engine/none) (registry code 00000, none) (OpenAirDocs)
- Category: Glider
- Engines: none
- Damage: Substantial damage
- Airport: Clover

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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