ATA Chapter: 31 Indicating/Recording Systems

(1)         System & Sequence Numbers

(2)         Rectification Interval

ITEM

(3)         Number installed

(4)         Number required for dispatch

(5)         Remarks or Exceptions

31-21-1

Clock

(MC)

31-21-1A

C

-

0

May be inoperative provided an accurate timepiece is operative in the flight crew compartment indicating the time in hours, minutes and seconds.

ATA Chapter: 31 Indicating/Recording Systems

(1)         System & Sequence Numbers

(2)         Rectification Interval

ITEM

(3)         Number installed

(4)         Number required for dispatch

(5)         Remarks or Exceptions

31-31-1

Flight Data Recorder (FDR)

(MC)

31-31-1A

D

-

-

Any in excess of those required by regulations may be inoperative provided that the FDR parameters are not required for monitoring purpose.

31-31-1B

A

-

0

May be inoperative provided that:

(a)   The aircraft does not exceed 8 further consecutive flights with the FDR inoperative, and

(b)   Less than a maximum of 72 hours have elapsed since the FDR was found to be inoperative, and

(c)   Any Cockpit Voice Recorder required to be carried is operative.

Note 1: This alleviation is not applicable to flight data and cockpit voice combination recorders. For those combined systems, see the entries for flight data and cockpit voice combination recorders in item 31-31-3.

Note 2: The flight data recorder is considered to be inoperative when any of the following conditions exist:

(i)  Loss of the flight recording function is evident to the flight crew during the pre-flight check, e.g. by means of a system status monitor; or

(ii) The need for maintenance has been identified by the system monitors, where available, and the failure origin has not been identified; or

(iii) Analyses of recorded data or maintenance actions have shown that more than 5 % of the total number of individual parameters (variable and discrete) required to be recorded for the particular aircraft, are not being recorded properly (refer to 31-31-1C).

              (continued)

ATA Chapter: 31 Indicating/Recording Systems

(1)         System & Sequence Numbers

(2)         Rectification Interval

ITEM

(3)         Number installed

(4)         Number required for dispatch

(5)         Remarks or Exceptions

              (continued)

Note 4: If an Underwater Locating Device (ULD) is required by regulation to be fitted to the FDR and this ULD is inoperative, the associated FDR is considered to be inoperative. If an Emergency Locator Transmitter (ELT) is required by regulation to be fitted to the FDR and this ELT is inoperative, the associated FDR is considered to be inoperative.

31-31-1C

A

-

0

Up to 5 % of the required parameters may be inoperative for a maximum of 90 calendar days or until the next maintenance inspection, whichever occurs first.

ATA Chapter: 31 Indicating/Recording Systems

(1)         System & Sequence Numbers

(2)         Rectification Interval

ITEM

(3)         Number installed

(4)         Number required for dispatch

(5)         Remarks or Exceptions

31-31-2

Flight Data and Cockpit Voice Combination Recorder (MC)

31-31-2A

D

-

-

(O) (M) Any function may be inoperative provided:

(a) The affected function is not required, and

(b) The affected data is not required for monitoring purposes.

31-31-2B

A

1

0

The flight data recorder and/or the cockpit voice recorder function may be inoperative provided that:

(a) The other function, where required, is operative,

(b) The aircraft does not exceed 8 further consecutive flights with the inoperative function, and

(c)  Less than a maximum of 72 hours have elapsed since the function was found to be inoperative.

Note 1: A flight data and cockpit voice combination recorder is a single flight recorder that combines the functions of a flight data recorder and of a cockpit voice recorder.

              (continued)

ATA Chapter: 31 Indicating/Recording Systems

(1)         System & Sequence Numbers

(2)         Rectification Interval

ITEM

(3)         Number installed

(4)         Number required for dispatch

(5)         Remarks or Exceptions

              (continued)

Note 2: The flight data recorder is considered to be inoperative when any of the following conditions exist:

(i)  The loss of the flight recording function is evident to the flight crew during the pre-flight check, e.g. by means of a system status monitor; or

(ii) The need for maintenance has been identified by the system monitors, where available, and the failure origin has not been identified; or

(iii) Analyses of recorded data or maintenance actions have shown that more than 5 % of the total number of individual parameters (variable and discrete) required to be recorded for the particular aircraft are not being recorded properly.

Note 3: Where improper recording affects 5 % of the required parameters or less, refer to item 31-31-4.

Note 4: If an Underwater Locating Device (ULD) is required by regulation to be fitted to the flight data and cockpit voice combination recorder and this ULD is inoperative, the associated flight data and cockpit voice combination recorder is considered to be inoperative. If an Emergency Locator Transmitter (ELT) is required by regulation to be fitted to the flight data and cockpit voice combination recorder and this ELT is inoperative, the associated flight data and cockpit voice combination recorder is considered to be inoperative.

              (continued)

ATA Chapter: 31 Indicating/Recording Systems

(1)         System & Sequence Numbers

(2)         Rectification Interval

ITEM

(3)         Number installed

(4)         Number required for dispatch

(5)         Remarks or Exceptions

              (continued)

31-31-2C

A

2

1

One of the two required flight data and cockpit voice combination recorders may be inoperative for a maximum of 10 calendar days.

Note: If an Underwater Locating Device (ULD) is required by regulation to be fitted to the flight data and cockpit voice combination recorder and this ULD is inoperative, the associated flight data and cockpit voice combination recorder is considered to be inoperative. If an Emergency Locator Transmitter (ELT) is required by regulation to be fitted to the flight data and cockpit voice combination recorder and this ELT is inoperative, the associated flight data and cockpit voice combination recorder is considered to be inoperative.

ATA Chapter: 31 Indicating/Recording Systems

(1)     System & Sequence Numbers

(2)     Rectification Interval

ITEM

(3)     Number installed

(4)     Number required for dispatch

(5)     Remarks or Exceptions

31-31-3

Quick Access Recorder (QAR)

(or any equivalent Flight Data Monitoring equipment)

(MC)

31-31-3A

C

1

0

(O)(M) May be inoperative when used for Flight Data Monitoring (FDM) purposes, provided approved alternate procedures, if appropriate to other programmes using associated data, are established and used.

Procedures

(O) or (M) To provide guidance for alternate procedures associated to data monitoring programmes, as applicable.

31-31-3B

D

1

0

May be inoperative provided procedures do not require its use.

ATA Chapter: 31 Indicating/Recording Systems

(1)     System & Sequence Numbers

(2)     Rectification Interval

ITEM

(3)     Number installed

(4)     Number required for dispatch

(5)     Remarks or Exceptions

31-31-4

Flight Data Recorder (FDR) Required Parameters

(MC)

31-31-4A

A

-

-

Up to 5 % of the required parameters may be inoperative for a maximum of 90 calendar days or until the next maintenance inspection, whichever occurs first.