News Listings for McDonnell Douglas MD-88

  • Delta JT8D fan finding

    News | 15 Apr 1997 23:00

    <p>Failure of inspection techniques at manufacture, assembly and in service were responsible for the Pratt &amp; Whitney JT8D-200 fan-hub failure which killed two passengers on a Delta Air Lines McDonnell Douglas MD-88 in July 1996, according to findings from a US National Transportation Safety Board hearing. A minor flaw caused during manufacture at Volvo Flygmotor, when a hub tie-rod hole was drilled, later went unnoticed by P&amp;W, and the resulting fatigue crack failed to show in Delta's dye-penetrant inspection, which have now been replaced by eddy-current techniques. </p>
  • Delta Air rolls out sliding carpet

    News | 24 Sep 1996 23:00

    <p>DELTA AIR LINES is to equip 150 McDonnell Douglas MD-88 and MD-90 airliners with Scandinavian Bellyloading's Sliding Carpet cargo and baggage loading system. </p> <p>Two cargo systems will be installed in each aircraft, in the fore- and aft-holds. </p> <p>The Sliding Carpet system, consisting of a Kevlar-reinforced conveyer belt and quick-release bulk- head, is designed to eliminate the need for an employee to work deep within the cargo bay of a narrowbody airliner to assist with loading. </p> <p>At the start of loading the bulkhead is located next to the cargo door. As available space is filled, the belt moves the bulkhead further into the hold, allowing loading to continue. For unloading, the belt is moved in the opposite direction. </p> <p>"In addition to the obvious advantages, the Bellyloader provides in speed and ease of handling, it also helps avoid serious problems of injuries and other health issues related to having employees work deep within a 1m-high space," says And
  • Failure on Delta JT8D concerns Safety Board

    News | 27 Aug 1996 23:00

    <p>A DELTA AIR LINES Boeing 727 suffered engine surge followed by the uncontained turbine failure of one of its three Pratt &amp; Whitney JT8D-15A engines during a climb from New York's LaGuardia Airport, on 14 August, says the US National Transportation Safety Board (NTSB). </p> <p>The incident, the second Delta JT8D turbine failure this year, will confirm the NTSB's already-stated concerns about alloy-forging techniques used for some JT8D turbine hubs before 1989. </p> <p>The surge caused engine debris to fall into a residential area. The captain decided to return to LaGuardia. The earlier event, which prompted NTSB warnings, involved a Delta 727, which had a similar turbine failure when it left LaGuardia on 30 January. </p> <p>In June, the NTSB demanded that periodic checks on pre-1989 JT8D turbines should be implemented immediately. </p> <p>In an unrelated incident, a JT8D-219 on a Delta McDonnell Douglas MD-88 at Pensacola on 6 July suffered uncontained fan-hub failure, which
  • NTSB urges increase in inspections of JT8D fan-hubs

    News | 06 Aug 1996 23:00

    INCREASED inspection of Pratt & Whitney JT8D-200-series fan hubs has been urged by the US National Transportation Safety Board (NTSB), following July's uncontained failure of an engine on a Delta Air Lines McDonnell Douglas MD-88. <p>Two passengers were killed and four injured when the left-engine hub disintegrated, sending debris into the cabin during take-off from Pensacola, Florida, on 6 July. The NTSB has recommended that the US Federal Aviation Administration require inspection of tie-rod holes in fan hubs which have accumulated more than 10,000 cycles. The checks would be conducted within 500 cycles of FAA approval of an "on-wing" eddy-current inspection method under development by Delta and P&W. <p>This interim check would be superseded by dye-penetrant and eddy-current inspections of tie-rod and stress-redistribution holes in all JT8D-200-series fan hubs by a fixed number of cycles, to be conducted when engines are removed for maintenance. <p>The NTSB says that the Delta fa
  • Suspect JT8D-200 fan hubs are removed from service

    News | 23 Jul 1996 23:00

    <p>FAN HUBS FROM six Pratt &amp; Whitney JT8D-200 engines have been removed from service after it was determined that they have the same manufacturing defect believed to have caused the uncontained failure on a Delta Air Lines McDonnell Douglas MD-88 on 7 July. The 25mm-long fatigue crack, which caused the hub to fail, is believed to have resulted from a surface anomaly in a tie-bolt hole. Six other Volvo hubs have the same surface anomaly. The machining distress was noted during inspection following manufacture, but was deemed to be acceptable. </p> <p>Three of the affected engines belong to Delta, but only two were in service. One was in operation with Continental Airlines, while affected engines owned by Finnair and the Ford Motor Company were in maintenance. According to P&amp;W, it is too early to say whether there are fatigue cracks in any of the hubs which have been removed. </p>
  • Hub crack is blamed for MD-88 fan failure

    News | 16 Jul 1996 23:00

    <p>A FATIGUE crack in the fan hub is the likely cause of the uncontained failure of a Pratt &amp; Whitney JT8D-219 powering a Delta McDonnell Douglas MD-88. Two passengers were killed and four injured when the left-engine fan disintegrated, sending debris into the cabin during the take-off run of Flight 1288 from Pensacola, Florida, to Atlanta, Georgia, on 6 July. Three passengers were injured during evacuation after the pilot aborted the take-off. There were 142 passengers and five crew on board. </p> <p>Initial examination of the disintegrated hub indicates that the fracture started at a 25mm-long fatigue crack in one of 24 tie-bolt holes in the hub. Some 13,000 cycles had been accumulated on the hub since it was delivered new to Delta in 1989. The hub was installed on the incident engine in January during maintenance to replace an oil seal. Delta says that the hub had undergone dye-penetrant inspection before installation. Just over 1,500h had been accumulated between installation