Investigation Summary
The incident began 19 minutes after takeoff when the number 2 engine displayed low oil pressure while descending through 15,000 feet, prompting the crew to shut it down and return to Miami. Shortly after, the remaining two engines also showed zero oil quantity and low pressure. The crew initially suspected faulty instrumentation, believing a simultaneous triple-engine oil failure was statistically impossible. However, at 16,000 feet during the return climb, the number 3 engine failed, followed five minutes later by the number 1 engine while the crew was attempting to restart the number 2 engine. The aircraft became a glider, losing all electrical power and flight deck instrumentation. The crew prepared the cabin for a ditching in the Atlantic Ocean. On their third attempt, the crew successfully restarted the number 2 engine at 4,000 feet, providing enough thrust to reach Miami International Airport. Post-flight inspection revealed that the master chip detectors on all three engines lacked the required O-ring seals, allowing oil to leak out steadily during flight. The NTSB investigation highlighted a systemic failure in maintenance procedures, noting that mechanics had failed to follow established protocols and that supervisory personnel had not enforced strict compliance, despite similar previous occurrences.
Final Conclusions
The NTSB determined the probable cause was the omission of O-ring seals on the master chip detector assemblies, leading to total oil loss and subsequent engine failures. This resulted from maintenance personnel failing to follow proper installation procedures, a lack of supervisory oversight, and management's failure to act on previous similar incidents. The FAA was also cited for inadequate surveillance and enforcement regarding these maintenance recurring issues.
Video Analysis
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Airframe & Maintenance
Crew Experience
Captain
Richard Boddy
Captain
Steve Thompson (Supervisory Check Airman)
Flight Engineer
Dudley Barnes
Systems & Failure Modes
Master Chip Detector
A magnetic plug designed to attract and hold metal particles (chips) from the engine oil, allowing maintenance to detect internal wear. If installed without O-rings, the assembly does not seal, leading to rapid oil loss.
Rolls-Royce RB211-22B
The triple-spool high-bypass turbofan engines powering the L-1011. All three suffered oil starvation due to the same maintenance oversight.
Interesting Facts
- 01The aircraft descended approximately 9,000 feet as a glider before an engine was restarted.
- 02All three engines were Rolls-Royce RB211-22B turbofans.
- 03The master chip detectors were missing O-rings, which are critical for sealing the engine lubrication system.
- 04The crew informed passengers to prepare for a water ditching before the engine restart.
- 05The incident led to a landmark U.S. Supreme Court case (Eastern Airlines, Inc. v. Floyd) regarding liability for mental distress under the Warsaw Convention.
Safety Actions & Advisories
Maintenance Procedure Review
Source ↗The NTSB recommended stricter enforcement of prescribed installation procedures for master chip detectors and better management assessment of recurring maintenance errors.
FAA Surveillance Enhancement
Source ↗The NTSB recommended that the FAA improve its surveillance and enforcement measures regarding maintenance inspectors to prevent the recurrence of similar incidents involving master chip detectors.
Known Controversies & Unanswered Questions
Liability for Mental Distress
Reference ↗A legal dispute arose over whether passengers could sue for psychological trauma under the Warsaw Convention without physical injury. This was because, after the shutdown of all engines but before successfully restarting the number 2 engine, the flight crew informed the cabin that the aircraft would have to be ditched in the Atlantic Ocean. The U.S. Supreme Court eventually ruled in favor of the airline, stating mental anguish alone was not compensable under the treaty's original French text.
Location
ACCIDENT SITE · Coordinates taken from the airport reference point.