# NTSB OAK72IP010: Beech 99, N921GP, Oakland, CA, September 27, 1971

- Type: NTSB incident investigation
- Classification: Incident · No injuries · Closed
- Date: September 27, 1971
- Place: Oakland, CA · OAKLAND, CA
- Location: 37.8044° N, 122.2708° W: Placed by OpenAirDocs: center of Oakland, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=37.8044&lon=-122.2708&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 6 uninjured
- Status: Completed, report May 18, 1972
- Report: Brief approved by the director
- NTSB case key (mKey): 164579
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=OAK72IP010
- Page: https://openairdocs.org/ntsb/OAK72IP010

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
5-0035  71/9/27    OAKLAND,CALIF       BEECH 99            CR-  0  0  2  COMMERCIAL                ATP,FLIGHT INSTR., AGE
        TIME - 1805                    N921GP              PX-  0  0  4  COMMUTER AIR CARRIER      42, 6515 TOTAL HOURS,
                                       DAMAGE-MINOR        OT-  0  0  0  AIR TAXI-PASSG S-D        2089 IN TYPE, INSTRUMENT
                                                                                                   RATED.
        CLASSIFIED AS INCIDENT
        NAME OF AIRPORT - OAKLAND INTL
        DEPARTURE POINT             INTENDED DESTINATION         LAST ENROUTE STOP
          ARCATA,CALIF                SAN FRANCISCO,CALIF          UKIAH,CALIF
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           WHEELS-UP                                                LANDING: LEVEL OFF/TOUCHDOWN
        PROBABLE CAUSE(S)
           AIRFRAME - LANDING GEAR: NORMAL RETRACTION/EXTENSION ASSEMBLY
           AIRFRAME - LANDING GEAR: EMERGENCY/EXTENSION ASSEMBLY
           MISCELLANEOUS - FOREIGN MATERIAL AFFECTING NORMAL OPERATIONS
           PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: INADEQUATE MAINTENANCE AND INSPECTION
        FACTOR(S)
           PILOT IN COMMAND - INADEQUATE PREFLIGHT PREPARATION AND/OR PLANNING
           MISCELLANEOUS ACTS,CONDITIONS - LANDED ON FOAMED RUNWAY
        EMERGENCY CIRCUMSTANCES - PRECAUTIONARY LANDING ON AIRPORT
                                  SUSPECTED MECHANICAL DISCREPANCY
        REMARKS- SHOP RAG LODGED BETWEEN NOSE GR FWD ACTUATING CHAIN AND IDLER SPROCKETS.JAMMED GR.
```

## Aircraft

- Registration: [N921GP](https://openairdocs.org/deregistered/N921GP-1972-02-25), registration cancelled 1972-02-25, S/N U-90 (OpenAirDocs)
- Reported make and model: BEECH 99
- Registry model: [Beech 99](https://openairdocs.org/model/beech-99) (registry code 1154002) (OpenAirDocs)
- Category: Airplane
- Engines: turbo prop
- Damage: Minor damage
- Airport: Oakland Intl

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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