Service Bulletin (SB) 1140B supersedes SB 1140A. Aircraft that were previously made compliant with SB 1140A are in compliance with SB 1140B.
SUBJECT: SB 1140B adds oxygen generator part number.
REASON FOR REVISION: OXYGEN GENERATOR PROTECTIVE CAP AND TUBE REMOVAL.
MODELS AFFECTED:
PA-46-310P Malibu
PA-46-350P Mirage / M350
PA-46-500TP Meridian / M500
PA-46-600TP M600
PA-46-701TP M700 Fury
SERIAL NUMBERS AFFECTED:
46-8408001 thru 46-8608067
4608001 thru 4608140
4622001 thru 4622200
4636001 thru 4636871
4697001 thru 4697725
4698001 thru 4698293
46020001 thru 46020090
COMPLIANCE TIME: Within the next 25 hours of aircraft operation.
WARNING: DO NOT OPERATE THE AIRCRAFT PRESSURIZED UNTIL THIS SERVICE BULLETIN HAS BEEN COMPLETED.
NOTE: Until compliance with this Service Bulletin, flight above 25,000 feet MSL or over terrain that does not allow a rapid descent to a safe, unpressurized altitude, is not recommended.
APPROVAL: The content of this service document has been reviewed and determined to be in accordance with applicable Federal Aviation Regulations.
PURPOSE: It has been discovered that the affected aircraft may have been equipped with emergency oxygen generators with the protective shipping cover and/or a silicon safety tube not removed. The oxygen generators are activated by a trigger mechanism that strikes a percussion cap located on the end of the generator. Failure to remove the protective cover from the percussion cap and/or the silicon tube will result in the trigger mechanism not making contact with the percussion cap and, consequently, no activation of the oxygen generator.
SERVICE BULLETIN NO. 1140B
AVAILABILITY OF PARTS: Your Piper Approved Service Center. Find your local service center at Piper.
EFFECTIVITY DATE: This service bulletin is effective on August 20, 2026.
SUMMARY: Applicable factory participation is limited to new aircraft in warranty at the time of compliance. Factory participation will remain in effect for a period of time not to exceed 180 days from the effectivity date of this service bulletin. Please contact your Piper Approved Service Center to make arrangements for compliance with this service bulletin in accordance with the compliance time indicated.
NOTE: Please notify the factory of any address/ownership corrections. Changes should include aircraft model, serial number, and current owner’s name and address.
Corrections and/or changes should be directed to:
