ATL97FA115

NTSB accident investigation · Mooney M20F · Tallahassee, FL · August 11, 1997

Accident · FatalField investigationFinal report
Date
August 11, 1997, 01:25 local (05:25 UTC)
Place
Tallahassee, FL
Injuries
2 fatal
Damage
Destroyed
Phase of flight
Enroute
Aircraft
N3455XMooney M20F
Weather
Visual (VMC) · Night/dark
Status
Completed · report September 4, 1998
Report
Approved by Office Director
FAA report
19970811021369A
Case key
3783

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

On this page

Probable cause

The NTSB’s determination of the probable cause, and any contributing factors.

fatigue failure of the crankshaft for undetermined reasons. Related factors were: darkness, and obstructions (trees) in the emergency landing area.

Analysis

During cruise flight at 5,000 feet msl in night visual conditions, the pilot reported a rough engine. ATC provided vectors to the nearest airport. Before reaching the airport, the engine quit. A forced landing was made about 2 miles short of the airport in a densely wooded area. After colliding with trees, the airplane impacted the ground, inverted. A postcrash ground fire destroyed the airplane. The engine crankshaft was found fractured through the #1 rod journal. Fracture features were mechanically damaged; the precise origin of the fracture could not be determined during a metallurgical examination. Examination of the airplane and engine records revealed no evidence of a propeller strike or previous impact damage.

Factual narrative

The factual narrative1,301 words

History of flight

On August 11, 1997, about 0125 eastern daylight time, a Mooney M20F, N3455X, collided with the ground during a forced landing at Tallahassee, Florida. The airplane was operated by the owner under the provisions of Title 14 CFR Part 91, and instrument flight rules (IFR). An instrument flight plan had been filed for the personal flight. Night, visual meteorological conditions prevailed. The commercial flight instructor, and the student pilot were fatally injured, and the airplane was destroyed by a post crash fire. The flight originated from the Lakefront Airport, New Orleans, Louisiana, about 2201 central daylight time, and was destined for the Vandenberg Airport, Tampa, Florida. Subsequent times contained in this report are eastern daylight time based on the 24 hour clock.

According to the Federal Aviation Administration Aircraft Accident Package prepared by Jacksonville Air Route Traffic Control Center (JAX ARTCC), the pilot of Mooney N3455X telephoned the DeRidder Automated Flight Service Station (AFSS) and obtained a preflight pilot brief for an IFR flight from New Orleans, Louisiana, Lakefront Airport (NEW) to Tampa, Florida, Vandenberg Airport (X16). An IFR flight plan was also filed.

According to the JAX ARTCC report, after departure the flight climbed to 5,000 feet mean sea level (msl) and proceeded on route. At 0106:18, while in contact with JAX ARTCC, N3455X requested vectors to the nearest airport and reported "...we're having a little bit of engine trouble here." Radar data obtained from the Federal Aviation Administration's (FAA) National Track Analysis Program (NTAP) plot depicted the radar position of N3455X, at that time, as 30:15:44 North latitude and 084:59:52 West longitude. That position, when plotted on a Sectional Aeronautical Chart, corresponded with a position about 34 Nmi west of Tallahassee, Florida, about 36 Nmi south of Marianna, Florida, about 36 Nmi east of Panama City, Florida and about 33 Nmi northeast of Tyndall Air Force Base, Florida.

Following the request, vectors toward the Tallahassee, Florida, airport were provided by JAX ARTCC. At 0107:27, the flight reported that the engine was rough and had "...cleared up a little bit...." The NTAP plot indicated that the airplane proceeded toward Tallahassee and climbed to 6,100 feet, msl. At 0117:06, N3455X reported that the engine had quit. The air traffic controller responded that the airport was located fifteen miles at 090 degrees from the airplane. The NTAP plot depicted the airplane as approximately 5,800 feet, at that time. The NTAP plot indicated that the airplane descended toward the airport at an average descent rate of about 651 feet per minute, until radar contact was lost. Radar and radio contact with the flight were lost at 0123:40, about three miles west of the airport. The last encoding altitude for the flight was 1,500 feet, mean sea level. The wreckage was subsequently located about one mile west of the airport, in a densely wooded national forest.

Personnel information

The owner/student pilot and a flight instructor were in the airplane. According to records obtained from the FAA, the student pilot was issued a third class medical certificate and student pilot certificate on April 3, 1997. The total pilot time reported on the medical certificate application on that date was 20 hours, all acquired within the previous six months. His pilot log was not located. The form also indicated that no prior application for a medical certificate had been made. The report of medical examination, contained on the same application, indicated that the student pilot had "Post surgical changes, both eyes; Radial Keratotomy, 6 months." A letter from the FAA Aeromedical Certification Division, dated September 5, 1997, indicated that the student pilot was eligible for a third-class medical certificate.

The instructor pilot held commercial pilot certificate number 227434337, with airplane single engine, multi engine, and instrument ratings. His last rating was issued on April 22, 1996. He held a certified flight instructor (CFI) certificate with airplane single engine , multi engine and instrument ratings. His CFI single engine rating was obtained on July 27, 1996. An instrument airplane rating to his CFI certificate was added on August 29, 1996. The instructor's pilot log was examined. The last entry was dated August 5, 1997. According to his logbook, the instructor had 945 total flight hours, with 569 flight hours as an instructor. His total hours at night were 91; total actual instrument hours, 12; and total simulated instrument hours were 52. He had 29 total hours in the same make and model airplane, all within the 90 days prior to the accident. His total CFI hours in the same make and model airplane were 15, with 34 hours as CFI at night. A duty-time sheet was found in the instructor's logbook that reflected an additional 21 total flight hours, that were not logged in his pilot's log.

Additional pilot information is found in this report on page 3 under First Pilot Information, and Supplement E.

Aircraft information

According to the airplane logbook, an annual inspection was conducted on February 12, 1997, at a total airframe time of 3,733 hours, and a tachometer time of 2,059 hours. An entry in the airplane log indicated that the transponder and the altimeter were inspected on May 30, 1997.

The engine log indicated that a Lycoming IO-360-A1A, serial number L-6890-51A was installed in N3455X on June 14, 1985. The log indicated that the engine had 1460 total hours at that time, with zero hours since major overhaul (SMOH). An entry in the engine log dated May 14, 1986, indicated that a top overhaul with four fresh chrome cylinders was accomplished, at 109 hours SMOH. On March 27, 1987, at 192 hours SMOH, according to the engine log, the engine was removed "to replace engine mount." Another log entry indicated that the cylinders were replaced "with new steel barrel" on May 27, 1987, at a time SMOH of 212 hours. According to the log, on June 17, 1993, all four cylinders were removed and new rings, gaskets, and seals installed, at 760 hours SMOH. The log indicated that on August 18, 1995, at a time SMOH of 1,063 hours, the propeller was removed and sent for overhaul because of a worn hub due to improper spinner installation. The subject propeller was not on the aircraft at the time of the accident. According to the log, a three blade propeller was installed on the airplane on February 12, 1997, and replaced with a two blade propeller four flight hours later, which according to the propeller log was on June 5, 1997. The engine log and propeller log indicated that the serial number of the propeller installed on June 5, 1997, was 731. The propeller found on the airplane at the accident site was a Hartzell Model HC-C2YK-BF with hub serial number CH21253. The previous owner, an airplane dealer, provided a copy of engine and propeller log entries, that had not been inserted in the engine and propeller log, that indicated that the installed propeller was hub serial number CH21258. The copies of the log entries stated that the propeller was balanced in accordance with Chadwick Helmuth Smooth Propeller. The dealer stated that propeller CH21258 was installed in place of 731, and the owner had not provided the logs at the time of the propeller exchange so that the entries could be placed in the logs. There was no indication in the airplane, engine, or propeller log of previous damage to the propeller. A maintenance release card (yellow tag) for propeller 731, dated May 10, 1968, contained the entry that damaged tips were repaired, however, propeller 731 was not installed on 3455X until June 5, 1997, and was removed on July 24, 1997.

Additional aircraft information is found in this report on page 2 under the heading Aircraft Information.

Meteorological information

The Aviation Routine Weather Report (METAR), at 0052 for Tallahas

Sequence of events

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

Loss of engine power(total) - mech failure/malfCruise
Engine assembly,crankshaft - fatigueCause
Forced landingEmergency descent/landing
In flight collision with objectEmergency landing
Light condition - dark nightFactor
Object - tree(s)Factor
In flight collision with terrain/waterEmergency descent/landing

Aircraft

Registration
N3455X
Reported as
Mooney M20F
Category
Airplane
Serial number
M20F670033
Airframe hours
3,733
Engine
Lycoming IO-360-A1A, 200 horsepower, reciprocating
Damage
Destroyed
Fire
On-Ground
Flight
Personal · Part 91
Registered owner
Keith G. Luber
Airworthiness certificate
Standard, Normal
Last inspection
Annual · February 12, 1997
Departed
NEW · New Orleans, LA
Destination
X16 · Tampa, FL
Flight plan
IFR
Airport
TLH · Tallahassee Regional, runway 9, 8,001 × 150 ft, asphalt

Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
24
Certificates
Commercial, Flight instructor
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 1, Valid Medical--no waivers/lim.
Seat
Right
Toxicology
Performed
Flight hours
945 total · 29 in this make and model · 857 as pilot in command · 263 in the last 90 days · 81 in the last 30 days

Weather

Conditions
Visual (VMC) · Night/dark
Wind
80° at 5 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
75 °F, dew point 73 °F
Altimeter
30.00 inHg
Observed at
TLH, 3 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.

Other investigations on N3455X · 1

Matched to the same aircraft by N-number and date.