COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Boeing 737 Series Aeroplanes
AD/B737/16
Amdt 3
Engine Flameouts - Revised Operating Technique and Modifications
10/92
Applicability: All Boeing 737-300 and 400 A/C fitted with CFM56-3 series engines.
Requirement: Part 1: Amend the Limitations section of the aircraft Flight Manual by adding the following instruction:
“OPERATION IN MODERATE TO HEAVY RAIN, HAIL, OR SLEET:
When operating in or in the vicinity of (near) moderate to heavy rain, hail, or sleet, accomplish the following:
- Engine start switches...............FLIGHT
2. Minimum engine N1..............45 per cent
3. Auto-Throttle...................OFF
Note: Operation in or in the vicinity of (near) moderate to heavy rain, hail, or sleet is to be assumed if indicated by any of the following sources: weather radar, reports, or observations.”
“OPERATING IN THUNDERSTORM ACTIVITY: CAUTIONARY NOTE:
Flight operation should be conducted so that operation within five miles of thunderstorm activity is avoided”.
(FAA Telegraphic AD T88-13-51R1 Amdt 39-6046 as amended by 39-6088 refers). BOEING 737.
Note 1: Compliance with Part 1 of this Directive may be achieved by inserting a copy of this TLX A.D. into the Limitations section of the Flight Manual pending receipt and incorporation of F.M. Amdt No A/AN 7373/10 (Ansett) A/TN 7373/10 (Australian) into the relevant Flight Manual.
Note 2: Compliance with the previous issues of this Directive does not constitute compliance with this AD/B737/16 Amdt 2.
Part 2: Amend the Minimum Equipment List as follows:
“For operation in known or forecast rain, hail or sleet the following items must be operable for despatch.
- Weather radar.
2. Engine ignition system - both engines left and right ignitors.”
COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
(FAA Telegraphic AD T88-13-51 R1 Amdt 39-6046 as amended by 39-6088 refers).
Note 1: Compliance with Part 2 of this Directive (for weather radar and engine ignition systems) may be achieved by inserting a copy of this TLX AD into the M.E.L. (sections-radar and ignition) pending receipt and incorporation of formally approved pages.
Note 2: The anti-ice section of the M.E.L. will satisfy compliance with this Directive when those Approved Statements which were in existence prior to 2 June (when AD/B737/16 was issued) are re-instated.
Part 3: Install a placard (red base, white lettering) on the instrument panel in clear view of the flight crew and in close proximity of the engines’ N1 indication gauges, that reads as follows:
“Maintain At Least 45 per cent N1 When Operating In Or Near Moderate To Heavy Rain, Hail, or Sleet”
Part 4: For model 737-300 series: Accomplish the engine modification described in Boeing Service Bulletin 737-77-1031, Revision 1, dated 14 May 1992.
Upon accomplishment of this modification, the requirements of Parts 1, 2 and 3 of this AD no longer apply.
Part 5: For model 737-400 series aircraft: Accomplish the engine modification described in Boeing Service Bulletin 737-77-1031 Revision 1, dated 14 May 1992. Upon accomplishment of this modification, the requirements of Parts 1, 2 and 3 of this AD no longer apply and any related flight compartment instrument panel placard, may be removed.
Note: FAA NPRM Number 92NM-27-AD of 2 July 1992 refers.
Compliance: For Parts 1 and 3 - Unless already accomplished, prior to further flight after 16 January 1989.
For Part 2 - Unless already accomplished, prior to further flight after 23 January 1989. For Parts 4 and 5 - By 01 August 1994.
Background: Parts 4 and 5 have been added to mandate incorporation of the CFM International modifications developed to make the engines more flameout resistant. They are intended to be the closing actions for this AD.