DDG Flashcards
Defects that require Etops fuel increase
24-11-02 VFSG Heat exchanger valves
30-21-01-02 Engine PRSOV
75-11-01B Engine Stator Valve
75-24-02-01/02 Turbine Cooling Valves
75-33-01 Eng Press Bleed Valve
Definition of Main Base
After A/C has dispatched 1st Flight of the day.
LHR/LGW become a transit station
SEA Single Event Authorisation may be applied when (2 things)
MEL/CDL maintenance action and or inspections required prior to dispatch and,
No BA authorised Engineer is available to rectify the defect.
How is an SEA applied?
(Instructions in DDG)
Maintrol finds an engineer, issues a code to the engineer
Capt confirms engineer is certified and that the SEA complies fully with Maintrol instructions
Capt enters details in Elog for next sector
Alleviated ETOPS transit check
If A/C has to depart from airfield lacking BA approved Engineer,
Capt can be authorised by Maintrol to conduct Alleviated Transit check.
Instructions are in Elog user guide, copy of the check is contained in the Additional documents folder
EICAS after dispatch (moved under own pwr)
Should be resolved by reference to MEL cross reference list
NONE - no MEL relief - RTS
(M) but no (O) - consider implications, notify maintrol, unless RTS required, expect to depart.
Has (O) - Apply any requirements, if also an (M) liaise with Maintrol expecting maintenance action - RTS?
Can only depart with (O) but not (M) complied with, when using Maintrol liaison, judgement & airmanship that the (O) procedures will continue to be effective.
Continuing with an open defect, consider..
Interaction with current Elog defects..
Must be noted in the log for rectification on the next sector.
Maintrol may still require RTS if outstation engineering support is insufficient to resolve issue.
STATUS msg - after start switches to START
Don’t need to be checked, BUT
should consider the implications of arriving with such a message at outstaion.
Repair Interval Extension RIE
What intervals can be extended
(Instructions on use in DDG)
CAA authorisation for 1 time extension for
B (3 days) and
C (10 days) intervals
Only used when events BEYOND BA’s control
Extends defect for same as the original interval as per the MEL eg, a further 3 or 10 days.
Repair intervals - 4 categories
A - no specified interval
B- 3 days
C- 10 days
D - 120 days - 05-00-01
Deferral categories - Non safety and pax convenience
05-00-01 - Non safety raised with a rectification interval of D - 120 days
(defect code has notes on factors to consider)
25-20-01 - Pax convenience - does not affect airworthiness or operation of A/C when U/S
except -
1. when has a dual use eg. IFE for safety demo.
2. if is part of A/C systems ie. deactivation required in case of malfunction
DDG Section 4 - Defects affecting PBN approaches
Check to ensure defect would inhibit PBN approach being flown.
22-11-03 - FD systems
27-22-02 - Flight Control Mode
31-61-01 - Display units
and 9 34-XX-XX defects
