# NTSB CHI75AC024: Beech 35, N3776N, Alliance, OH, September 1, 1974

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Closed
- Date: September 1, 1974
- Place: Alliance, OH · ALLIANCE, OH
- Location: 40.9112° N, 81.1198° W: Placed by OpenAirDocs: center of Alliance, OH, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=40.9112&lon=-81.1198&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 3 fatal
- Status: Completed, report December 5, 1974
- Report: Brief approved by the director
- NTSB case key (mKey): 138608
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI75AC024
- Page: https://openairdocs.org/ntsb/CHI75AC024

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3923   74/9/1    ALLIANCE,OHIO       BEECH 35            CR-  1  0  0  NONCOMMERCIAL             COMMERCIAL, AGE 53, 716
        TIME - 1018                    N3776N              PX-  2  0  0  PLEASURE/PERSONAL TRANSP  TOTAL HOURS, 20 IN TYPE,
                                       DAMAGE-DESTROYED    OT-  0  0  0                            NOT INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          READING,PA                  KENOSHA,WIS
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           AIRFRAME FAILURE: IN FLIGHT                              IN FLIGHT: DESCENDING
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - CONTINUED VFR FLIGHT INTO ADVERSE WEATHER CONDITIONS
           PILOT IN COMMAND - EXCEEDED DESIGNED STRESS LIMITS OF AIRCRAFT
           PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: INADEQUATE MAINTENANCE AND INSPECTION
           SYSTEMS - OTHER SYSTEMS: VACUUM SYSTEM
        FACTOR(S)
           AIRFRAME - WINGS: SPARS
           MISCELLANEOUS ACTS,CONDITIONS - OVERLOAD FAILURE
           MISCELLANEOUS ACTS,CONDITIONS - SEPARATION IN FLIGHT
        REMARKS- VACUM PUMP INOP.ON TOP DSCNDD THRU CLDS,BETTER WX AHEAD.VACUM SYS MOD NOT IN ACCORD ACPTD PRACTICE
```

## Aircraft

- Registration: [N3776N](https://openairdocs.org/deregistered/N3776N-1975-01-24), registration cancelled 1975-01-24, S/N D-998 (OpenAirDocs)
- Reported make and model: BEECH 35
- Registry model: [Beech 35](https://openairdocs.org/model/beech-35) (registry code 1151502) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Destroyed

## 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 19740901040389A](https://openairdocs.org/incident/19740901040389A), Sep 1, 1974: Beech 35BEECH, Alliance, OH, Destroyed, 2 fatal. Vacum pump inop. On top dscndd thru clds,better wx ahead. Vacum sys mod not in accord acptd practice

## Other investigations on N3776N (2)

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 CHI70FBD21](https://openairdocs.org/ntsb/CHI70FBD21), Mar 21, 1970: Beech 35 (N3776N), West Chicago, IL, substantial damage
- [NTSB CHI67F0015](https://openairdocs.org/ntsb/CHI67F0015), May 22, 1966: Beech 35 (N3776N), Mentone, IN, 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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