# NTSB SEA74FYE23: Sikorsky S-58E, N4382S, Alpental, WA, October 19, 1973

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: October 19, 1973
- Place: Alpental, WA · ALPENTAL, WA
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report January 29, 1974
- Report: Brief approved by the director
- NTSB case key (mKey): 188024
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA74FYE23
- Page: https://openairdocs.org/ntsb/SEA74FYE23

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3608  73/10/19   ALPENTAL,WASH       SIKORSKY S-58E      CR-  0  0  2  COMMERCIAL                ATP,FLIGHT INSTR., AGE
        TIME - 0950                    N4382S              PX-  0  0  0  CONSTRUCTION              27, 3230 TOTAL HOURS, 330
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            IN TYPE, INSTRUMENT
                                                                                                   RATED.
        NAME OF AIRPORT - BANDERA STATE
        DEPARTURE POINT             INTENDED DESTINATION
          SEATTLE,WASH                ALPENTAL,WASH
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLISION WITH GROUND/WATER: CONTROLLED                  IN FLIGHT: LOW PASS
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - DIVERTED ATTENTION FROM OPERATION OF AIRCRAFT
           PILOT IN COMMAND - FAILED TO MAINTAIN ADEQUATE ROTOR R.P.M.
           PILOT IN COMMAND - IMPROPER OPERATION OF POWERPLANT & POWERPLANT CONTROLS
           PILOT IN COMMAND - IMPROPER OPERATION OF FLIGHT CONTROLS
           PILOT IN COMMAND - IMPROPER IN-FLIGHT DECISIONS OR PLANNING
        FACTOR(S)
           TERRAIN - ROUGH/UNEVEN
        REMARKS- PILOT ALLOWED RPM TO DECAY DURING UPSLOPE SURVEY
```

## Aircraft

- Registration: [N4382S](https://openairdocs.org/deregistered/N4382S-1978-09-12), registration cancelled 1978-09-12, S/N 581627 (OpenAirDocs)
- Reported make and model: SIKORSKY S-58E
- Registry model: [Sikorsky S-58J](https://openairdocs.org/model/sikorsky-s-58j) (registry code 8141814) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Bandera State

## 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 19731019036399A](https://openairdocs.org/incident/19731019036399A), Oct 19, 1973: Skrsky S58E, Alpental, WA, Substantial damage. Pilot allowed RPM to decay during upslope survey

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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