American Airlines Flight 1572

American Airlines Flight 1572 was a flight from

Flight 1572 was scheduled to depart from O'Hare at 21:25 Eastern Standard Time. Because of bad weather and delayed connecting passengers, however, the flight was delayed and did not depart until 23:05. While en route to Hartford, the flight crew, Captain Kenneth Lee (39), and First Officer John Richards (38), received an ACARS printout for the weather at Hartford. It noted an altimeter setting (reference atmospheric pressure) of 29.42 inches of mercury (996 hPa), adding that pressure was falling rapidly in the area. The flight cruised uneventfully from Chicago to Hartford, other than changing from 33,000 ft (10,000 m) to 35,000 ft (11,000 m) to avoid reported turbulence.^[1]: 2

While on descent into Hartford, the pilots received a weather update at 00:30 that included a warning of

At 00:49, while Flight 1572 was beginning its final approach, the crew was advised that the control tower was closing temporarily due to severe weather buckling a window inside the cab. The tower supervisor remained behind to assist the flight. The captain noticed the autopilot was having difficulty maintaining altitude and heading in the buffeting winds. Five miles from the airport the aircraft encountered heavy rain and some turbulence. The flight continued descending to 908 ft (277 m), the minimum descent altitude (MDA) for the approach. As the crew began to look for the airport, the aircraft continued descending.

At 00:51, winds at Bradley were measured as 170° at 25 knots (13 m/s), gusting to 40 knots (21 m/s), with an altimeter setting of 29.35 inHg (994 hPa) and falling rapidly. This information was not transmitted to the Bradley control tower until 00:57 and was not made available to the flight crew before landing.^[1]: 14

Crash

At 00:55, the sink rate alarm went off, followed seconds later by a loud thump as the aircraft began shearing off treetops along

The accident resulted in one minor injury to a passenger; the other 72 passengers and all 5 crew members escaped without injury. The accident resulted in $9 million in damage to the aircraft and over $74,000 in damage to airport equipment.[1]^: 11

NTSB investigation

The National Transportation Safety Board investigated the accident.

The investigation cited several causes for this accident. It faulted the Federal Aviation Administration (FAA) for designing the approach to runway 15 without taking the ridgeline into consideration. The new approach, which factors in the terrain, has increased the MDA to 1,320 ft (400 m). It cited pilot error as the primary cause due to an incorrect altimeter setting combined with the crew's failure to level off at the MDA. The report also noted that because pressure was falling rapidly, the crew should have requested a more recent altimeter setting from the tower—the ATIS broadcast is normally updated hourly or whenever weather conditions change, and the first officer had noted that the ATIS recording was over 90 minutes old.^[1]: 63 Although turbulence, heavy rain, and wind shear affected the aircraft, the crew continued to allow it to descend while searching for the airport.

The

The incident was featured on season 22 of the Canadian documentary series Mayday, in the episode titled "Tree Strike Terror".^[3]

References

External links

• CVR transcript American Airlines Flight 1572 on aviation-safety.net