# NTSB ATL97FA021: Bellanca 17-31ATC, N123SS, Fitzgerald, GA, December 1, 1996 - Type: NTSB accident investigation - Classification: Accident · Fatal · Field investigation · Final report - Date: December 1, 1996, 08:20 local (13:20 UTC) - Place: Fitzgerald, GA - Coordinates: 30.839324, -83.269805 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=30.8393&lon=-83.2698&mi=10 - Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping) - Highest injury: Fatal - Injuries: 3 fatal, 1 serious - Status: Completed, report March 31, 1998 - Report: Approved by Office Director - NTSB case key (mKey): 3770 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ATL97FA021 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/3770/pdf - Page: https://openairdocs.org/ntsb/ATL97FA021 ## Probable cause A loss of engine power due to the blockage of the intake manifold of the induction air system, by the broken alternate air door, and the loss of aircraft control for undetermined reasons. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Loss of engine power, maneuvering - induction air control,alternate air/door - failure (cause) - induction air control,intake manifold - blocked(total) (cause) - Forced landing, emergency descent/landing - Loss of control - in flight, maneuvering - reason for occurrence undetermined (cause) - aircraft weight and balance - exceeded, pilot in command - In flight collision with terrain/water, descent - uncontrolled ## Analysis The pilot could not recall the accident flight and there were no impact witnesses. He stated it was misting rain during loading & engine run-up. He also noted a weather front moving in from the north, and clear to the southeast. Relatives helped load the airplane, watched it depart, then drove to Florida. After an unknown elapsed time, an ear witness heard fluctuating engine sounds followed by an impact. He found the airplane south of runway 19. The airplane had impacted in a steep left wing & nose down attitude. Subsequent investigation revealed the intake air box alternate air door broken loose. A fresh fracture was evident on the door hinge. The spark plugs were sooted. The fuel injection system tested within limits. ## Factual narrative HISTORY OF FLIGHT On December 1, 1996, about 0820 eastern standard time, a Bellanca 17-31ATC, N123SS, collided with the ground during an uncontrolled descent at the Fitzgerald Municipal Airport, Fitzgerald, Georgia. The airplane was operated under the provisions of Title 14 CFR Part 91, and visual flight rules. Visual meteorological conditions prevailed southeast of the airport. A flight plan was not filed for the personal flight. The airline transport pilot was seriously injured, and the three passengers were fatally injured. There was substantial damage to the airplane. The time of the departure was unknown. The pilot flew into Fitzgerald airport the Wednesday prior to the accident. The airplane had not been flown until the day of the accident. The pilot had the airplane topped-off, with 100LL grade fuel, the afternoon prior to the accident. On the morning of the accident, the pilot obtained weather information by listening to the Weather Channel on television. The pilot recalled a light misting rain falling when he arrived at the airport and during the engine run-up. The pilot recalled the run-up and nothing afterwards. The pilot's in-laws observed the loading of the airplane and watched the takeoff. They stated that they didn't get wet and did not note any gusty winds, while at the airport. They observed the airplane use most of the runway during the takeoff roll and climb into the clouds, but not as quickly as usual. They left the airport after the takeoff, unaware of the accident. After an unknown elapsed time, an ear witness heard fluctuations of an aircraft engine followed by the sounds of impact. He discovered N123SS approximately 300 yards beyond the departure threshold of runway 19. According to this investigator, the witness verbally informed the Investigator-In-Charge that it was raining hard with thunder and lightning at the time he heard the impact. PERSONNEL INFORMATION The pilot was certificated as an Airline Transport Pilot with B-737, CE-500, DC-9, FK-28, FK-100, MD-80 and LR-JET type ratings. He had more than 11700 total flight hours. The pilot stated that, at the time of the accident, he was a Captain with USAirways in the MD-80 airplane. The pilot stated that he had flight experience in several general aviation light airplanes. The pilot had been flying this particular airplane, completing the same trip, West Palm Beach to Fitzgerald to West Palm Beach, for the past several years. He recounted an incident in a Mooney 201 during which there was a loss of power during descent. The pilot executed a successful forced landing in shallow water with minor impact damage. AIRCRAFT INFORMATION The Bellanca Viking 300A is a four seat, low wing, retractable tricycle landing gear, single engine airplane. The weekend prior to the flight to Fitzgerald, the owner of the airplane had flown to Venice, Florida, in N123SS, for the day. After the departure from Venice, the owner experienced a reduction in engine power. The owner left the airplane in Venice for repairs, which included the replacement of a cracked fuel line. After the airplane was repaired, the accident pilot test flew the airplane, and noted it performed without malfunctions. He then made the flight to Fitzgerald. The aircraft log, for N123SS, indicated that an annual inspection was performed on September 12, 1996, and was determined to be in airworthy condition. The engine log for this same annual inspection indicated that the induction alternate air door was replaced. According to the engine log, on May 28, 1996, a screw was found loose in the alternate air door as well as the seal missing. The corrective action taken was removing the old door and installing a used serviceable door, with new hardware. The air induction system for the Bellanca Viking 300A consists of a filtered air intake and an alternate air intake. Under normal operation, the filtered air intake is utilized. In the event the filtered air intake becomes clogged, the alternate air intake, which is a suction operated door in the air box, will become operational. The alternate air door operates by increased air pressure, from internal suction, overcoming the spring resistance, which holds the door closed. See attached diagram. The Weight and Balance for N123SS for takeoff was calculated as follows: Item Weight(lb.) Arm(in) Moment Licensed Empty Weight 2492.2 18.07 45034.054 Pilot and Front Passenger 215.0 20.00 4300.000 Rear Seat Passenger 140.0 53.00 7420.000 Baggage(186 lb. max.) 131.0 84.00 11004.000 Oil 22.5 -41.00 -922.500 Fuel - 60 gallons 360.0 29.00 10440.000 Auxiliary tank - 15 gallons 90.0 72.00 6480.000 Total Loaded Aircraft 3450.7 83755.554 C.G. = 24.27" aft of datum (Moment / Weight) The maximum allowable gross weight for the Viking 300A is 3325lbs. The C.G. limitation at 3325lbs is 22.0 to 23.5" aft of datum. The baggage was weighed at the accident sight. This data was based on known weights of the passengers and baggage. METEOROLOGICAL INFORMATION At the time of the flight, visual meteorological conditions prevailed southeast of the airport, and instrument meteorological conditions prevailed to the north. On December 1, 1996, at 0850 eastern standard time (EST), the Automatic Terminal Information Services (ATIS) for Southwest Georgia Airport, Albany, Georgia, located 48 nautical miles (nm) west of Fitzgerald, was reporting winds from 210 degrees at 10 knots (kt), a ceiling of 800 feet overcast, visibility of 2 1/2 miles, lightening and thundershowers overhead moving east. At 0850 EST, the ATIS for Bacon County Airport, Alma, Georgia, located 40 nm east of Fitzgerald, was reporting winds 210 degrees at 10 kt, a ceiling of 8000 feet overcast, occasional lightening in clouds overhead. Weather information was obtained for Fitzgerald Airport, from 0701 EST to 0921 EST. At 0821, the reported weather was temperature 66 degrees Fahrenheit, dewpoint 65 degrees Fahrenheit, wind 200 degrees at 13 kt, barometric pressure of 29.87" mercury. From 0701 to 0921, the temperature and dewpoint become closer, and from 0841 to 0921, they became the same at 65 degrees Fahrenheit. The barometric pressure increases from 29.83 to 29.90", between 0701 and 0921 EST. The pilot stated that he obtained weather information by watching the Weather Channel on the television, about 0600 to 0700 EST, the morning of the accident. He stated that he noted a weather front moving in from north of the airport, with a discernible cloud front. He also stated that southeast of the airport was clear. During the run-up, he recalled a light misting rain falling. WRECKAGE AND IMPACT INFORMATION The wreckage was found approximately 300 yards south of the runway 19 departure threshold, near a peanut patch. A ground scar was observed, with debris from the left wingtip found adjacent to it. Beyond that, debris from the engine cowling was found, leading up to the main wreckage. The airplane was found upright. The spinner was found crushed aft and peeled around the propeller dome. All three propeller blades were twisted spanwise toward lower pitch. All three blades had scrape marks running chordwise on the cambered side. One propeller blade was bent aft. One blade had several 1/4" deep gouges on the leading edge. The engine, and the attached nose gear frame, were displaced aft of their original position. The nose gear was found collapsed, as if in the process of retrac ## Aircraft - Registration: [N123SS](https://openairdocs.org/deregistered/N123SS-1998-06-15), registration cancelled 1998-06-15, S/N 7431079 (OpenAirDocs) - Reported make and model: Bellanca 17-31ATC - Registry model: [Bellanca 17-31ATC](https://openairdocs.org/model/bellanca-17-31atc) (registry code 1220437) (OpenAirDocs) - Category: Airplane - Serial number: 74-31079 - Airframe hours: 1895 - Engines: Lycoming 17-31ATC 300 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Operator: Albert J. Townsend - Registered owner: Robert L. Bentz - Airworthiness certificate: Standard, Normal - Last inspection: Annual, September 12, 1996, 25 hours before - Departed: FZG - Destination: PBI, WEST PALM BEACH, FL - Airport: FZG, Fitzgerald Airport, runway 19, 5,002 × 100 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 38; airline transport; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; seat: left; toxicology performed; flight hours: 11,700 total ## Weather - Conditions: Instrument (IMC), Day - Wind: 210° at 10 knots - Visibility: 2.5 statute miles - Lowest ceiling: 800 ft overcast - Temperature: 64 °F, dew point 64 °F - Altimeter: 29.00 inHg - Observed at: ABY, 48 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 19961201036859A](https://openairdocs.org/incident/19961201036859A), Dec 1, 1996: Blanca 1731ATC, Fitzgerald, GA, Substantial damage, 3 fatal. Took off vft into heavy rain shower from a thunderstorm. Appears stalled returning. Over weight. 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.