ASN Wikibase Occurrence # 40102
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| Date: | Saturday 28 July 1990 |
| Time: | 10:40 |
| Type: |  Piper PA-18A |
| Owner/operator: | Sky Signs |
| Registration: | N2789P |
| MSN: | 18-4424 |
| Total airframe hrs: | 5000 hours |
| Engine model: | LYCOMING O-320-A2B |
| Fatalities: | Fatalities: 1 / Occupants: 1 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Conway, SC -
 United States of America
|
| Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
| Nature: | Banner and glider towing |
| Departure airport: | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
BANNER TOW OPNS WERE BEING CONDUCTED. THE PLT TOOK OFF TO MAKE THE 1ST BANNER TOW OF THE DAY. WHEN THE TOW HOOK (GRAPPLING HOOK ON A ROPE) WAS DEPLOYED, THE TOW LINE BCM ENTANGLED IN THE RUDDER control & INTERFERED WITH ITS MOVEMENT. ACCORDING TO OPERATOR PSNL, THE PLT SHOULD HAVE VISUALLY CHECKED THE GRAPPLING HOOK LINE AFTER IT WAS DEPLOYED TO ASSURE THAT IT WAS NOT FOULED ON THE RUDDER BELL CRANK; AND IF IT WAS, HE SHOULD HAVE LNDD TO FREE THE LINE, RATHER THAN PICK UP THE BANNER. THE ACFT WAS EQUIPPED WITH A HOOK RELEASE MECHANISM (IAW STC SA 1-349). HOWEVER, THERE WAS EVIDENCE THAT WHEN THE BANNER WAS CAPTURED, ITS WT PLACED TENSION ON THE TOW HOOK LINE & PRECLUDED ITS RLS AS WELL AS CAUSING A DEFLECTED RUDDER. SUBSEQUENTLY, THE ACFT STALLED & SPUN TO THE GND. OPERATOR PSNL RPRTD THAT THE ACFT WOULD HAVE BEEN CONTROLLABLE WITH THE LINE FOULED ON THE RUDDER BELL CRANK. FAA CIRCULAR (AC 43.13-2A) STATED THAT THE SYS SHOULD HAVE BEEN TESTED TO INSURE THERE WAS NO INTERFERENCE WITH THE TAILWHEEL OR ADJACENT STRUCTURE. CAUSE: TOWLINE INTERFERENCE WITH THE RUDDER, AND FAILURE OF THE PILOT TO MAINTAIN ADEQUATE AIRSPEED, WHICH RESULTED IN A STALL/SPINN. A FACTOR THAT CONTRIBUTED TO THE ACCIDENT WAS: FAILURE OF THE COMPANY/OPERATOR MANAGEMENT TO ADEQUATELY GUARD AGAINST SUCH INTERFERENCE.
Sources:
NTSB: https://www.ntsb.gov/ntsb/brief.asp?ev_id=20001212X23596
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 24-Oct-2008 10:30 | ASN archive | Added |
| 21-Dec-2016 19:23 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
Corrections or additions? ... Edit this accident description
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