IAD01IA034

History of flight

On March 6, 2001, about 0100 eastern standard time, a McDonnell-Douglas DC-10, N375FE, operated as Federal Express flight 1610, experienced an uncontained (#2) engine failure during takeoff from Boston/Logan International Airport (BOS), Boston, Massachusetts. The three flight crewmembers and one jumpseat passenger were not injured. Instrument meteorological conditions prevailed and an instrument flight rules flight plan was filed for the cargo flight conducted under 14 CFR Part 121.

The Captain prepared a statement that was signed by all three crewmembers. According to the statement:

"After the runway was opened, we had the aircraft anti-iced and taxied to Runway 4R. We accomplished final aircraft configuration approaching the runway and were cleared for takeoff with engine and wing anti-ice on and continuous ignition on. This was the Captain's takeoff. During takeoff roll we felt some vibrations but with cold tires, snow, and runway clutter, we did not feel that was abnormal. There were no abnormal cockpit indications. As we broke ground, tower called that they may have seen "sparks" coming from the number 2 engine. After tower called, we checked again but all cockpit indications were still normal, although we had vibrations from somewhere. The Captain pulled back the number 2 throttle and felt vibrations decrease in intensity. He then felt the start levers but no vibrations were sensed and all engine indications remained normal."

"We elected to declare an emergency and return to BOS. The F/O [First Officer] assumed flying responsibilities while the Captain and Engineer ran the 'One engine inoperative approach and landing checklist' as a precaution. Because there were still no definitive indications of the source of the vibration, we left the number 2 engine at idle and prepared for a CAT II monitored approach to runway 4R."

"On base leg, the Captain noted number 2 engine hydraulic pressure low lights on. We accomplished the phase one action items for 'Hydraulic quantity leak or loss of hyd sys 3 elev off light on'.

"The F/O flew the monitored CAT II to runway 04R and Captain took the aircraft approaching minimums. Winds were approximately 050/22 kts. A normal landing was accomplished."

"The Captain applied brakes and initiated reverse thrust. Simultaneously, the tower and fire trucks said the number 2 engine was on fire. The F/O shut down the number 2 start lever, pulled the number 2 fire handle and discharged one fire bottle while the Captain was stopping the aircraft. The fire department notified us that the fire was still burning, so all fire handles were pulled, all fire bottles were discharged, and the Captain directed an emergency evacuation."

"The Engineer opened the main cabin door and deployed the slide. The winds blew the slide up against the side of the aircraft so the firefighters had to hold it down in order for the crew to evacuate. All four crewmembers (3 operating crew and 1 jumpseater) were unhurt and waited in the fire truck until the emergency was terminated by the fire department."

The accident occurred during the hours of darkness at 42 degrees, 22 minutes north latitude, and 071 degrees, 00 minutes west longitude.

Personnel information

The captain held an airline transport pilot certificate with ratings for airplane multi-engine land. He reported 5,716 hours of total flight experience, 98 hours of which were in the 90 days prior to the accident. The captain stated he had 2,124 hours of flight experience in the DC-10.

The first officer held an airline transport pilot certificate with a rating for airplane multi-engine land. He reported 2,442 hours of flight experience, 134 hours of which were in the 90 days prior to the accident. The first officer stated he had 461 hours of experience in the DC-10.

Aircraft information

The airplane was a 1972 McDonnell Douglas DC 10-10, and it was owned and operated by the Federal Express Corporation. The previous owner/operator was United Airlines. The airplane had 72,372 hours of flight time and 28,470 cycles accrued. The engine installed in the No. 2 (center) position was a General Electric CF6-6D.

According to a McDonnell Douglas Service Bulletin dated April 18, 1976:

"Six operators have reported eight instances of foreign object damage (FOD) to engine 2. Damage occurred during operation in severe cold weather and is attributed to blockage of the inlet ring (bellmouth) drain hose by ice. Blockage of the hose prevents drainage of any accumulated water from the engine inlet ring. Subsequent freezing of the water causes formation of ice, which can be ingested into the engine during engine start, resulting in engine damage. Replacing the existing inlet drain hose with a new hose incorporating a heater will prevent blockage of the hose by ice. Installation of the new hose will assure proper drainage of the inlet ring and minimize the possibility of engine damage."

Examination of the airplane by a Federal Aviation Administration (FAA) inspector revealed that the drain line to the #2 engine inlet ring drain was installed, but the line was not equipped with the heat element. Further, the wiring for the heat element was installed, but was capped off behind the circuit breaker panel.

Examination of the maintenance records revealed that the heated drain-line modification was noted as complete, with no mention of capped electrical wiring.

According to written statements by the personnel who de-iced the airplane, the airplane was de-iced and treated with anti-ice solution three times between 21:52 and 23:48. According to the FAA inspector, a member of the de-icing crew reported that a large puddle of deicing fluid was visible in the #2 engine bellmouth.

Meteorological information

At the time of the accident, the weather reported at Boston/Logan included winds from 010 degrees at 16 knots, gusting to 24 knots. The visibility was 2 miles in fog and snow.

According to the FAA inspector, the airplane was parked outside all day in snowy weather. The snow continued off and on all day, with the airport closing runways periodically for snow removal. "Blizzard" conditions existed around the time of takeoff.

Flight recorders

The digital flight data recorder was examined, data was extracted, and a Safety Board recorder specialist prepared a report on March 13, 2001.

The cockpit voice recorder was reviewed and a Safety Board recorder specialist prepared a transcript on March 20, 2001.

Wreckage and impact information

A Safety Board Powerplants specialist examined the airplane at the scene on March 2, 2001. According to the specialist's report:

"An on-site investigation of the airplane in Boston revealed nicks, dents, and punctures in the No.2 engine inlet duct right-hand side, from the aft looking forward (ALF), forward of the front face of the engine. The bellmouth and inlet adapter ring were completely missing. The left-hand side of the fan cowl had a burn-through at the 9 o'clock position. Two stage-1 fan blades had transverse separations below the mid-span shroud.

All of the stage-1 fan blades exhibited both soft and hard body foreign object damage. The forward fan case had a tear in the plane of the stage 1 blades at the 4 o'clock position. All of the forward outer acoustic panels and stage-1 fan abradable shroud material were missing. The fan outlet guide vanes were separated from the inner acoustic panels. The No. 2 engine main fuel supply line and the No. 2 aircraft hydraulic pressure line were severed."

"The weather in Boston prior to departure was reported as rain, sleet, and snow. The aircraft was deiced at 2130 and again at 2345 hours. The delay between the two deicings was due to the runway being closed for snow removal. As required, an inlet inspection of the No. 2 engine was performed following the deicing to assure that there were no accu