# NTSB MIA94LA193: Grumman AA-5, N1392R, Ormond Beach, FL, August 10, 1994 - Type: NTSB accident investigation - Classification: Accident · Serious injuries · Limited investigation · Final report - Date: August 10, 1994, 17:30 local (21:30 UTC) - Place: Ormond Beach, FL - Location: 29.2858° N, 81.0559° W: Placed by OpenAirDocs: center of Ormond Beach, FL, within about 6 miles (OpenAirDocs) - Nearby events: https://openairdocs.org/map.md?lat=29.2858&lon=-81.0559&mi=10 - Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping) - Highest injury: Serious injuries - Injuries: 2 serious - Status: Completed, report April 5, 1995 - Report: Approved by Office Director - NTSB case key (mKey): 37585 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MIA94LA193 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/37585/pdf - Page: https://openairdocs.org/ntsb/MIA94LA193 ## Probable cause THE IMPROPER MAINTENANCE WORK DONE ON THE CARBURETOR BY A LOCAL MECHANIC THAT RESULTED IN LOSS OF ENGINE POWER OVER UNSUITABLE TERRAIN. A CONTRIBUTING FACTOR WAS THE DIRT AND MOISTURE THAT CONTAMINATED THE CARBURETOR. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Loss of engine power(total) - mech failure/malf, takeoff - induction air ducting - distorted - maintenance,service of aircraft/equipment - improper, other maintenance personnel (cause) - fuel system,carburetor - contamination (contributing factor) - Forced landing, descent - emergency - In flight collision with object, descent - emergency - terrain condition - none suitable (contributing factor) - object - tree(s) - In flight collision with terrain/water, descent - uncontrolled ## Analysis THE INSTRUCTOR AND STUDENT EXPERIENCED A LOSS OF ENGINE POWER ON TAKEOFF. THE AIRPLANE COLLIDED WITH TREES AND FELL TO THE GROUND. EXAMINATION OF THE ENGINE AIR INDUCTION SYSTEM REVEALED A DISTORTED SEAL AT THE CARBURETOR FLANGE THAT ALLOWED DIRT AND MOISTURE TO ENTER THE CARBURETOR. THE CARBURETOR HAD BEEN REMOVED AND WORKED ON BY A LOCAL MECHANIC 2 DAYS BEFORE THE ACCIDENT. ## Factual narrative On August 10, 1994, about 1730 easter daylight time, N1392R, a Grumman AA-5, registered to the student pilot Leonard Ross, crashed after takeoff at Ormond Beach, Florida while on a 14 CFR Part 91 instructional flight. Visual meteorological conditions prevailed and no flight plan was filed for the local flight. The airplane was substantially damaged and the instructor and student received serious injuries. The flight originated about 30 minutes earlier. Witnesses observed the airplane take off from runway 08, heard the engine fail and observed the airplane stall into trees. The airplane then fell vertically to the ground, ripping the roof off of the cockpit. Postcrash examination of the airplane by FAA personnel revealed water and dirt inside the carburetor and rust deposits in the carburetor bowl. The rubber seal around the carburetor air induction flange was found deformed, pinched and not fully sealing the flange. The flight instructor stated the engine had failed to develop full power and 2 days before the accident and the engine had been worked on by local maintenance personnel. The local maintenance shop work order stated that both the carburetor and carburetor float had been removed and reinstalled. ## Aircraft - Registration: [N1392R](https://openairdocs.org/deregistered/N1392R-2015-05-20), registration cancelled 2015-05-20, S/N AA5-0792, built 1975 (OpenAirDocs) - Reported make and model: GRUMMAN AA-5 - Registry model: [Grumman American Avn. AA-5](https://openairdocs.org/model/grumman-american-avn-aa-5) (registry code 3960104) (OpenAirDocs) - Registry engine: [Lycoming 0-320 series](https://openairdocs.org/engine/lycoming-0-320-series) (registry code 41508, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 0792 - Engines: LYCOMING O-320-D2G 150 horsepower reciprocating - Damage: Substantial damage - Flight: Instructional, Part 91 - Operator: Ross,Leonard - Registered owner: Inherit The Wind Inc. - Airworthiness certificate: Standard, Normal - Departed: ORM - Destination: ORM, FL - Airport: ORM, Ormond Beach, runway 8, 4,004 × 100 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 26; airline transport, flight instructor, commercial, flight engineer; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; seat: right; flight hours: 2,759 total, 159 in this make and model, 2,373 as pilot in command, 100 in the last 90 days, 38 in the last 30 days ## Weather - Conditions: Visual (VMC), Day - Wind: 50° at 9 knots - Visibility: 10 statute miles - Lowest ceiling: 3,200 ft broken - Temperature: 82 °F, dew point 75 °F - Altimeter: 30.00 inHg - Observed at: DAB, 16 nm away ## 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 19940810021039A](https://openairdocs.org/incident/19940810021039A), Aug 10, 1994: Gulstm AA5, Ormond Beach, FL, Substantial damage. Lost power on climbout. Stalled into trees. Rust in carburetor bowl. Flange deformed. Recent carburetor maintenance 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.