Airbus A320 N311US

Summary

On 4 May 2009 at about 18:18 local time, a Airbus A320 registered N311US, operated by Northwest Airlines Inc, was involved in an accident near Denver, Colorado, United States. 154 people were on board and 4 had minor injuries. The aircraft was substantially damaged. The NTSB has published a probable cause for this accident; it is quoted in full below.

Date

4 May 2009 at 18:18

Classification

Accident

Location

Denver, Colorado, United States

Nearest airport

Denver International (KDEN)

Coordinates

39.7499, -104.9992

Aircraft

Airbus A320

Registration

N311US

Category

Airplane

Engines

2

Operator

Northwest Airlines Inc

Operating rule

Part 121: Air Carrier

Phase of flight

Not recorded

Route

Minneapolis → Denver

Aircraft damage

Substantial

Weather

VMC

Light

Day

NTSB number

DCA09FA047

4 people had minor injuries.

The first officer’s excessive pitch-up of the airplane while landing with a tailwind, which resulted in a tailstrike following a bounced landing. Contributing to the bounced landing were a high descent rate and excessive thrust resulting from the first officer’s delay in retarding the thrust levers to idle, thereby providing residual thrust and preventing spoiler deployment.

Quoted verbatim from the NTSB record. This site does not paraphrase or interpret it.

Read the full NTSB narrative

The flight crew was conducting a straight-in approach during visual meteorological conditions. The approach was backed up by an instrument landing system and was stable at 1000 feet above touchdown. During the final approach the crew noted an increasing tailwind. As the first officer (FO) entered the flare, the “retard” automatic callout sounded; this automatic call-out is designed to remind the pilot to move the thrust levers to idle. Despite the callout, the thrust levers remained at climb and the autothrust system commanded increased engine power in an attempt to recover airspeed. The airplane touched down, but then bounced as a result of excess thrust and the position of the thrust levers forward of idle, which prevented deployment of the spoilers. The FO then retarded the thrust levers, which allowed spoiler deployment, and the airplane touched down firmly. During the second touchdown, the FO began pitching the airplane nose up to about 12.5 degrees, which is greater than the specified maximum pitch angle and which resulted in the tailstrike. The captain attempted to add nose-down pitch to prevent the tailstrike but was too late. The aircraft experienced heavy abrasions, dents, and perforations of the skin; the aft galley drain mast and two aircraft antennas were broken; the auxiliary power unit air intake sustained damage and the rear pressure bulkhead was buckled and cracked.

Quoted verbatim from the NTSB record.