Grumman American AA1B accident near Pomona, CA
On February 27, 2002, a Grumman American AA1B (airplane) was involved in an accident near Pomona, CA. 1 person died. Damage to the aircraft: substantial.
- Date
- February 27, 2002
- Place
- Pomona, CA
- Aircraft
- Grumman American AA1B · Airplane
- Injuries
- 1 fatal, 0 serious, 0 minor
- Damage
- Substantial
- Position
- 34.097°N, 117.782°W
- NTSB ID
- 20020228X00283
Official records · LAX02FA097
- Public docket: reports, statements and exhibits from the investigation
Air traffic control records
- Transcript of Radio Communications: Transcript (PDF), on ntsb.gov
NTSB summary
HISTORY OF FLIGHT On February 26, 2002, at 1650 Pacific standard time, a Grumman American AA1B, N1628R, collided with Barn No. 2 at the Los Angeles County Fair Grounds, Pomona, California, after a loss of engine power on base leg for landing at Brackett Field, La Verne, California. The airplane was operated by the pilot as a local maintenance test flight under the provisions of 14 CFR Part 91. The pilot sustained fatal injuries and the airplane was substantially damaged. Visual meteorological conditions prevailed and no flight plan had been filed. The local flight originated at 1645. The airplane was owned by a partnership, and all of the members were active in aviation. According to statements from both a partner in the airplane and a member of the pilot's family, the carburetor had been overhauled by Barkhorn Precision Engines, a Federal Aviation Administration (FAA) approved repair station (ARS), concurrent with an engine major overhaul. After the initial carburetor overhaul, the airplane was operated about 11 hours, with the pilots who flew the airplane reporting an occasional intermittent carburetor rich fuel/air mixture in the idle circuit. One of the partners stated that after the overhaul, he had on occasion idled the engine about 1100 rpm, rather than allowing the engine to idle any slower and "load up" from excessive fuel. On February 6, 2002, during a biennial flight review, one of the partners was asked by his flight instructor to perform a short field landing. He was required to throttle all the way back and the engine quit during the landing rollout. At that p
Probable cause
a total loss of engine power due to an excessively rich mixture setting in the carburetor. The overly rich operation of the carburetor was due to the overhaul shop's failure to obtain the proper clearance between the float and chamber walls, which allowed the float to rub and hang up. The overhaul shops failure to achieve the correct clearances was due in part to the inadequacy of the manufacturer
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Browse: California · Grumman American aircraft
Source: NTSB aviation accident database (US government, public domain). Findings may be preliminary or later revised by the NTSB. Not a complete global record.
