# NTSB CHI70A0039: Beech 99, N7485N, Detroit, MI, December 9, 1969

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: December 9, 1969
- Place: Detroit, MI · DETROIT, MI
- Location: 42.3314° N, 83.0458° W: Placed by OpenAirDocs: center of Detroit, MI, within about 7 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=42.3314&lon=-83.0458&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 11 uninjured
- Status: Completed, report March 10, 1970
- Report: Brief approved by the director
- NTSB case key (mKey): 148937
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI70A0039
- Page: https://openairdocs.org/ntsb/CHI70A0039

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3330   69/12/9   DETROIT,MICH        BEECH 99            CR-  0  0  2  COMMERCIAL                COMMERCIAL, FL.INSTR.,
        TIME - 0930                    N7485N              PX-  0  0  9  COMMUTER AIR CARRIER      AGE 38, 4400 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0  AIR TAXI-PASSG S-D        600 IN TYPE, INSTRUMENT
                                                                                                   RATED.
        NAME OF AIRPORT - DETROIT METRO
        DEPARTURE POINT             INTENDED DESTINATION
          FORT WAYNE,IND              DETROIT,MICH
        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 ACTS,CONDITIONS - IMPROPER ALIGNMENT/ADJUSTMENT
           MISCELLANEOUS ACTS,CONDITIONS - JAMMED
           PERSONNEL - PRODUCTION-DESIGN-PERSONNEL: OTHER
        EMERGENCY CIRCUMSTANCES - PRECAUTIONARY LANDING ON AIRPORT
                                  SUSPECTED MECHANICAL DISCREPANCY
        REMARKS- LNDG GR RIGGED IAW BEECH 99 SHOP MANUAL DURING ACFT MAINT. MANUAL INSTRUCTIONS WERE IMPROPER.
```

## Aircraft

- Registration: N7485N (not matched to a registry record)
- Reported make and model: BEECH 99
- Category: Airplane
- Engines: turbo prop
- Damage: Substantial damage
- Airport: Detroit Metro

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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