# NTSB CHI74FEV49: Hiller Acft UH-12A, N7636B, Springfield, IL, May 1, 1974

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: May 1, 1974
- Place: Springfield, IL · SPRINGFIELD, IL
- Location: 39.8017° N, 89.6437° W: Placed by OpenAirDocs: center of Springfield, IL, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=39.8017&lon=-89.6437&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report August 7, 1974
- Report: Brief approved by the director
- NTSB case key (mKey): 125988
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI74FEV49
- Page: https://openairdocs.org/ntsb/CHI74FEV49

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-1913   74/5/1    SPRINGFIELD,ILL     HILLER ACFT UH-12A  CR-  0  0  1  MISCELLANEOUS             AIRLINE TRANSPORT, AGE
        TIME - 0852                    N7636B              PX-  0  0  0  TEST                      51, 21000 TOTAL HOURS, 8
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            IN TYPE, INSTRUMENT
                                                                                                   RATED.
        NAME OF AIRPORT - CAPITAL
        DEPARTURE POINT             INTENDED DESTINATION
          SPRINGFIELD,ILL             LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           HARD LANDING                                             LANDING: LEVEL OFF/TOUCHDOWN
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - ATTEMPTED OPERATION BEYOND EXPERIENCE/ABILITY LEVEL
           PILOT IN COMMAND - MISJUDGED SPEED AND ALTITUDE
        FACTOR(S)
           PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: IMPROPER MAINTENANCE (OWNER PERSONNEL)
           ROTORCRAFT - ROTOR ASSEMBLIES: BLADE TRIM TABS
           PILOT IN COMMAND - LACK OF FAMILIARITY WITH AIRCRAFT
        EMERGENCY CIRCUMSTANCES - PRECAUTIONARY LANDING ON AIRPORT
                                  AIRFRAME BUFFET
        REMARKS- NOT ROTORCRAFT RATED.ADJUSTED BLADE TRIM TAB IMPROPERLY.STRUCK TAIL ON EXPEDITED LDG.M/R HIT TAIL.
```

## Aircraft

- Registration: [N7636B](https://openairdocs.org/deregistered/N7636B-2017-10-30), registration cancelled 2017-10-30, S/N 51-16107, built 1951 (OpenAirDocs)
- Reported make and model: HILLER ACFT UH-12A
- Registry model: [Hiller UH-12A](https://openairdocs.org/model/hiller-uh-12a) (registry code 4360104) (OpenAirDocs)
- Registry engine: [Franklin 6V4 series](https://openairdocs.org/engine/franklin-6v4-series) (registry code 27033, reciprocating) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Capital

## 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 19740501013629A](https://openairdocs.org/incident/19740501013629A), May 1, 1974: Hiller UH12A, Springfield, IL, Substantial damage. Not rotorcraft rated. Adjusted blade trim tab improperly. Struck tail on expedited ldg.m/r hit tail.

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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