The Gremlin's Homily

The preamble on non-normal checklist operation states:

While every attempt is made to provide needed non-normal checklists, it is

not possible to develop checklists for all conceivable situations, especially

those involving multiple failures. In some unrelated multiple failure

situations, the flight crew may combine elements of more than one checklist

or exercise judgment to determine the safest course of action. The captain

must assess the situation and use good judgment to determine the safest

Air Data Inertial Reference System

(ADIRS)

The ADIRU provides air data (pitot-static pressure, TAT and AOA) and inertial reference data to several systems on the aircraft, including the primary flight control system, the autopilot flight director system and the flight management system. The ADIRS sits atop of

– the ADIRU

– the secondary attitude air data reference unit (SAARU)

– the air data modules (ADM)

– the pitot probes

– the static ports

– the total air temperature (TAT) probe

– the angle of attack (AOA) sensors

– standby attitude indicator.

THE ADIR SYSTEM

 (ADIRS)

Auto-throttle

 DISCONNECT

Buttons

Auto-throttle ENGAGE Switches

A 4.4mb zipped animation of the 9M-MRG incident is available at tinyurl.com/yuecud

( requiring a free player from:   tinyurl.com/2ef2bo )

For the Airbus version of a similar software versus hardware redundancy glitch, see the G-VATL incident in the April, 4, 2005 issue of ASW at tinyurl.com/299kdf

(“Thrice Almighty” - 5 web pages long)