# NTSB MIA93LA149: Grumman AA-1B, N8962L, Ocala, FL, July 4, 1993 - Type: NTSB accident investigation - Classification: Accident · Minor injuries · Limited investigation · Final report - Date: July 4, 1993, 09:06 local (13:06 UTC) - Place: Ocala, FL - Coordinates: 29.159351, -82.209068 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=29.1594&lon=-82.2091&mi=10 - Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping) - Highest injury: Minor injuries - Injuries: 1 minor - Status: Completed, report July 25, 1994 - Report: Approved by Office Director - NTSB case key (mKey): 37367 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MIA93LA149 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/37367/pdf - Page: https://openairdocs.org/ntsb/MIA93LA149 ## Probable cause PREMATURE LIFT OFF BY THE PILOT DURING TAKEOFF. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Loss of control - in flight, takeoff - initial climb - lift-off - premature, pilot in command (cause) - stall/mush - inadvertent, pilot in command - Hard landing, landing - Gear collapsed, landing ## Analysis THE FLIGHT DEPARTED AND DURING THE INITIAL CLIMB, THE PILOT REPORTED THAT THE AIRPLANE SHUDDERED AS IF IT WOULD FALL APART. THE SHUDDERING STOPPED WHEN HE DECREASED THE ANGLE OF ATTACK; AND THE ENGINE DID RESPOND TO THROTTLE INPUT. HE AGAIN INITIATED A CLIMB AND THE SHUDDERING STARTED AGAIN. HE ABORTED THE TAKEOFF AND WHILE MANEUVERING TO AVOID OBSTACLES PAST THE DEPARTURE END OF THE RUNWAY, THE AIRPLANE STALLED AND LANDED HARD ON THE GRASS. THE NOSE AND RIGHT MAIN LANDING GEARS COLLAPSED. HE FURTHER STATED THAT THE SHUDDERING WAS SIMILAR TO THAT ENCOUNTERED WHILE PERFORMING STALLS AND THAT HE DID NOT HEAR ANY UNUSUAL ENGINE SOUNDS. THE FUEL SYSTEM WAS CHECKED FOR WATER; NONE WAS FOUND. EXAMINATION OF THE ENGINE REVEALED NO EVIDENCE OF FAILURE OR MALFUNCTION. ## Factual narrative On July 4, 1993, about 0906 eastern daylight time, a Grumman AA-1B, N8962L, registered to the pilot, William L. Hines, was substantially damaged during an aborted takeoff from the Ocala Municipal Airport, Ocala, Florida, while on a 14 CFR Part 91 personal flight. Visual meteorological conditions prevailed at the time and no flight plan was filed for the local flight. The private pilot sustained minor injuries. The flight was originating at the time of the accident. The pilot stated that during the initial climb, the aircraft shuddered as if it would fall apart. The shuddering stopped after he decreased the angle of attack; and the engine did respond to throttle input. He again initiated a climb and the shuddering began again. He aborted the takeoff and while maneuvering to avoid obstacles at the departure end of the runway, the airplane stalled and landed hard on grass. The nose and right main landing gears collapsed. He further stated that the shuddering was similar to that encountered when performing stalls and that he did not hear any unusual engine sounds. As a result of the accident, the fuel tanks were damaged but the remaining fuel in them, the carburetor, and electric fuel pump were checked for water; none was found. A slight amount of sediment was found. An A & P mechanic who examined the engine stated that it was "intact." The magnetos were removed, rotated by hand, which revealed that they produced more than sufficient spark. ## Aircraft - Registration: [N8962L](https://openairdocs.org/deregistered/N8962L-1999-08-18), registration cancelled 1999-08-18, S/N AA1B-0412 (OpenAirDocs) - Reported make and model: GRUMMAN AA-1B - Registry model: [Grumman American Avn. AA-1B](https://openairdocs.org/model/grumman-american-avn-aa-1b) (registry code 3960103) (OpenAirDocs) - Category: Airplane - Serial number: AA1B-0412 - Airframe hours: 2137 - Engines: LYCOMING O-235-C2C 108 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Registered owner: Hines, William L. - Airworthiness certificate: Standard, Normal - Last inspection: Annual, October 23, 1992, 31 hours before - Airport: OCF, Ocala Municipal, runway 18, 6,906 × 150 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 59; private; airplane ratings: single-engine land; medical: class 3, valid medical--w/ waivers/lim; seat: left; flight hours: 900 total, 6 in this make and model ## Weather - Conditions: Visual (VMC), Day - Wind: 190° at 3 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 79 °F, dew point 73 °F - Altimeter: 30.00 inHg - Observed at: OCF ## 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 19930704021979A](https://openairdocs.org/incident/19930704021979A), Jul 4, 1993: Gulstm AA1B, Ocala, FL, Substantial damage. Reported aircraft shuddered on climbout. Aborted. Stall landed off end runway. Collapsed right main. No anomalies. 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. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.