AC 27-1B, Chg 7 2/4/2016 Note: Not all ATA chapters or subchapters have been included. Also, the italicized entries are not usually included in the failure condition description but in the systems description or assumptions section.
ATA 24-00-00 - ELECTRICAL POWER Failure Phase of Effect of the Failure on Classification Notes Supporting Verification ATA Function Description (FC) Condition Operation the Aircraft, Crew and Occupants of the FC (assumptions) Material Method Total loss of ALL Aircrew workload would Analysis and ALL substantially increase due / or test electrical to increased difficulty power in discerning the aircraft VFR (night) attitude via outside approved references.
rotorcraft
(e.g., comm., NAV, attitude, altitude, airspeed, etc.).
Loss of ALL A significant reduction in Analysis and primary safety margins due to loss test electrical of redundant power of a power and critical flight system.
the aircraft is equipped Aircrew workload would with slightly increase to electrical / compensate for any electronic power-shed equipment.
flight controls (fly by wire).
Figure AC 27 MG 21-1. Generic Examples by ATA.
Page MG 21 - 18
Note: Not all ATA chapters or subchapters have been included. Also, the italicized entries are not usually included in the failure condition description but in the systems description or assumptions section.
ATA 24-00-00 - ELECTRICAL POWER Failure Phase of Effect of the Failure on Classification Notes Supporting Verification Function ATA Description (FC) Condition Operation the Aircraft, Crew and Occupants of the FC (assumptions) Material Method Loss of ALL A significant reduction in Analysis and primary safety margins due to loss test electrical of redundant power of a power to required flight system.
systems essential to Aircrew workload would safe slightly increase to continued compensate for any IFR flight power-shed equipment.
(e.g., comm., NAV, attitude, altitude, airspeed, etc.).
Figure AC 27 MG 21-1. Generic Examples by ATA.
Page MG 21 - 19
AC 27-1B, Chg 7 2/4/2016 Note: Not all ATA chapters or subchapters have been included. Also, the italicized entries are not usually included in the failure condition description but in the systems description or assumptions section.
ATA 26-00-00 - FIRE PROTECTION Failure Phase of Effect of the Failure on Classification Notes Supporting Verification ATA Function Description (FC) Condition Operation the Aircraft, Crew and Occupants of the FC (assumptions) Material Method 26-11 Smoke Detection Provide Inability to A substantial reduction in Analysis, smoke detect smoke ALL safety margins would Gnd Test detection in in the cabin exist due to the delay in cabin compartment. the pilot's reaction to take immediate action.
The aircrew workload would increase substantially due to handling emergency procedures.
Occupants could succumb to smoke inhalation.
Figure AC 27 MG 21-1. Generic Examples by ATA.
Page MG 21 - 20
Note: Not all ATA chapters or subchapters have been included. Also, the italicized entries are not usually included in the failure condition description but in the systems description or assumptions section.
ATA 26-00-00 - FIRE PROTECTION Failure Phase of Effect of the Failure on Classification Notes Supporting Verification ATA Function Condition Operation the Aircraft, Crew and of the FC (assumptions) Material Method Description (FC) Occupants Provide Inability to A substantial reduction in Analysis, smoke detect smoke ALL safety margins would Gnd Test detection in in the exist due to the delay in baggage baggage the pilot's reaction to take compart- compart- immediate action.
ment ment.
The aircrew workload would increase significantly due to handling emergency procedures.
Occupants could succumb to smoke inhalation.
26-12 Fire Detection Provide fire Unannunci- A substantial reduction in Analysis detection of ated loss of ALL safety margins would and/or Flt engine fire fire detection exist due to the latency of Test zone. in the engine the failure increasing the compartment risk of an actual fire going (single and undetected.
dual engine).
Aircrew workload would not be affected.
Figure AC 27 MG 21-1. Generic Examples by ATA.
Page MG 21 - 21
AC 27-1B, Chg 7 2/4/2016 Note: Not all ATA chapters or subchapters have been included. Also, the italicized entries are not usually included in the failure condition description but in the systems description or assumptions section.
ATA 26-00-00 - FIRE PROTECTION Failure Phase of Effect of the Failure on Classification Notes Supporting Verification ATA Description Function (FC) Condition Operation the Aircraft, Crew and Occupants of the FC (assumptions) Material Method Unannunci- ALL A substantial reduction in ated loss of safety margins would fire detection exist due to the latency of in the cargo the failure increasing the or baggage risk of an actual fire going compartment. undetected.
Aircrew workload would not be affected.
26-20 Fire Extinguishing Provide fire Loss of fire ALL A slight reduction of suppression suppression safety margin due to of engine in engine indication to the cockpit fire zone. compartment and the limited exposure on (single of the failure condition.
and dual engine).
Figure AC 27 MG 21-1. Generic Examples by ATA.
Page MG 21 - 22
Note: Not all ATA chapters or subchapters have been included. Also, the italicized entries are not usually included in the failure condition description but in the systems description or assumptions section.
ATA 28-00-00 - FUEL Failure Phase of Effect of the Failure on Classification Notes Supporting Verification ATA Function Condition Operation the Aircraft, Crew and of the FC (assumptions) Material Method Description (FC) Occupants 2841 Fuel Loss of fuel ALL Slight increase in pilot Quantity quantity workload as the pilot must indication estimate remaining fuel (single and from the last fuel quantity dual reading.
engine).
Loss of low ALL Aircraft safety margins fuel level will decrease slightly.
warning (single and dual engine).
Combination ALL Substantial reduction in loss of qty safety margins with the indication loss of all fuel quantity and low fuel indications.
level warning Significant aircrew (single and workload due to the need dual to change the planned engine). flight and find a suitable landing site before approximated fuel starvation.
Figure AC 27 MG 21-1. Generic Examples by ATA.
Page MG 21 - 23
AC 27-1B, Chg 7 2/4/2016 Note: Not all ATA chapters or subchapters have been included. Also, the italicized entries are not usually included in the failure condition description but in the systems description or assumptions section.
ATA 28-00-00 - FUEL Failure Phase of Effect of the Failure on Classification Notes Supporting Verification ATA Function Description Condition (FC) Operation Occupants the Aircraft, Crew and of the FC (assumptions) Material Method Misleading ALL Fuel quantity indicating fuel qty more fuel than actual indication quantity.
(single and Large reduction in aircraft dual safety margins due to low engine). fuel warning indicator as the only means of fuel starvation prevention.
Aircrew workload increases substantially due to unexpected low fuel annunciation.
Misleading ALL Fuel quantity indicating fuel quantity more fuel than actual indication quantity.
and loss of low fuel A substantial reduction in warning safety margins due to (single and sudden and unexpected dual loss of engine power.
engine).
Aircrew may not being able to continue safe flight and landing.
Figure AC 27 MG 21-1. Generic Examples by ATA.
Page MG 21 - 24
Note: Not all ATA chapters or subchapters have been included. Also, the italicized entries are not usually included in the failure condition description but in the systems description or assumptions section.
ATA 28-00-00 - FUEL Failure Phase of Effect of the Failure on Classification Notes Supporting Verification ATA Function Description Condition (FC) Operation Occupants the Aircraft, Crew and of the FC (assumptions) Material Method 2822 Airframe Loss of ALL Aircraft safety margins Fuel Pump pump reduced to a level at Provide fuel (single which continued safe fight to the engine engine). and landing is not guaranteed due to loss of required fuel pressure to maintain engine operation (engine stoppage).
Aircrew workload reaches a level of not being able to continue safe flight and landing due fuel starvation and resulting engine stoppage; must conduct autorotation.
Loss of ALL Loss of fuel flow to one pump (dual engine results in a engine significant reduction in [CAT AI). safety margins.
Aircrew workload significantly increases due to transition to Category A OEI flight procedures.
Figure AC 27 MG 21-1. Generic Examples by ATA.
Page MG 21 - 25
AC 27-1B, Chg 7 2/4/2016 Note: Not all ATA chapters or subchapters have been included. Also, the italicized entries are not usually included in the failure condition description but in the systems description or assumptions section.
ATA 28-00-00 - FUEL Failure Phase of Effect of the Failure on Classification Notes Supporting Verification ATA Function Condition Operation the Aircraft, Crew and of the FC (assumptions) Material Method Description (FC) Occupants 2843 Fuel Loss of fuel ALL A slight reduction of Analysis and Temperature temp safety margin due to Test Indicator indication. indication to the cockpit and the limited exposure of the failure condition.
Misleading ALL A large reduction in safety Analysis and fuel temp. margins or functional Test capabilities.
ATA 29-00-00 - HYDRAULIC POWER Failure Phase of Effect of the Failure on Classification Notes Supporting Verification ATA Function Description (FC) Condition Operation the Aircraft, Crew and Occupants of the FC (assumptions) Material Method 29-10 Hydraulic Loss of ALL A slight reduction of Analysis and System, Main hydraulic safety margin due to Text pressure. indication to the cockpit and the limited exposure of the failure condition.
A significant increase in pilot workload that tasks, such as precision flight, cannot be accurately conducted.
Figure AC 27 MG 21-1. Generic Examples by ATA.
Page MG 21 - 26
Note: Not all ATA chapters or subchapters have been included. Also, the italicized entries are not usually included in the failure condition description but in the systems description or assumptions section.
ATA 34-00-00 - NAVIGATION Failure Phase of Effect of the Failure on Classification Notes Supportin Verification ATA Function Condition Operation the Aircraft, Crew and of the FC (assumptions) g Material Method Description (FC) Occupants 3416 Altimeter Total loss of ALL Aircrew workload Analysis and ALL altitude increases to a level at Test indication in which continued safe IFR. flight and landing is not guaranteed due to unknown height above the ground; no external cues.
Total loss of ALL Aircrew workload ALL altitude substantially increases indication in due to unknown height night VFR. above the ground; low external cues.
Misleading ALL Aircrew workload Analysis and indication increases to a level at Test and/or which continued safe malfunction flight and landing is not of the guaranteed due to altitude in unknown height above IFR. the ground; no external cues.
Figure AC 27 MG 21-1. Generic Examples by ATA.
Page MG 21 - 27
AC 27-1B, Chg 7 2/4/2016 Note: Not all ATA chapters or subchapters have been included. Also, the italicized entries are not usually included in the failure condition description but in the systems description or assumptions section.
ATA 34-00-00 - NAVIGATION Failure Phase of Effect of the Failure on Classification Notes Supportin Verification ATA Function Description (FC) Condition Operation the Aircraft, Crew and Occupants of the FC (assumptions) g Material Method Misleading ALL Aircrew workload Analysis and indication increases to a level at Test and/or which continued safe malfunction flight and landing is not of the guaranteed due to altitude unknown height above indication in the ground; no indication night VFR. to use external cues.
3414 Airspeed Total loss of ALL The reduction in safety Analysis Indicator ALL airspeed margins and functional indication in capability in the system IFR. may prohibit continued safe flight and landing.
Total loss of ALL The loss of critical Analysis and ALL airspeed information will result in Test indication in a large reduction in VFR - night. safety margins and functional capability.
Aircrew workload may increase to a level such that they could not be relied upon to perform tasks accurately or completely.
Figure AC 27 MG 21-1. Generic Examples by ATA.
Page MG 21 - 28
Note: Not all ATA chapters or subchapters have been included. Also, the italicized entries are not usually included in the failure condition description but in the systems description or assumptions section.
ATA 34-00-00 - NAVIGATION Failure Phase of Effect of the Failure on Classification Notes Supportin Verification ATA Function Condition Operation the Aircraft, Crew and of the FC (assumptions) g Material Method Description (FC) Occupants Misleading ALL Aircrew workload may Analysis and indication increase to a level such Test and/or that they could not be malfunction relied upon to perform of the tasks accurately or airspeed in completely.
IFR.
Misleading ALL Aircrew workload may Analysis and indication increase to a level such Test and/or that they could not be malfunction relied upon to perform of the tasks accurately or airspeed in completely.
VFR - night.
3421 Attitude Total loss of ALL The reduction in safety Analysis ALL attitude margins and functional indication in capability in the system IFR. may prohibit continued safe flight and landing.
Total loss of ALL Aircrew workload may Analysis and ALL attitude increase to a level such Test indication in that they could not be VFR - night. relied upon to perform tasks accurately or completely.
Figure AC 27 MG 21-1. Generic Examples by ATA.
Page MG 21 - 29