Airworthiness Directive · Amendment 39-18569 · General Electric Company Turbofan Engines
General Electric Company Turbofan Engines
Superseded. A later AD replaced this one: AD 2017-08-05. Comply with the one in force.
This AD applies to General Electric Company (GE) GE90-76B, GE90-77B, GE90-85B, GE90-90B, and GE90-94B turbofan engines with a high-pressure compressor (HPC) stage 8-10 spool, part numbers (P/Ns) 1694M80G04, 1844M90G01, or 1844M90G02, installed.
We are adopting a new airworthiness directive (AD) for all General Electric Company (GE) GE90-76B, GE90-77B, GE90-85B, GE90-90B, and GE90-94B turbofan engines. This AD was prompted by an uncontained failure of the high-pressure compressor (HPC) stage 8-10 spool, leading to an airplane fire. This AD requires eddy current inspection (ECI) or ultrasonic inspection (USI) of the HPC stage 8-10 spool and removing from service those parts that fail inspection. We are issuing this AD to prevent failure of the HPC stage 8-10 spool, uncontained rotor release, damage to the engine, and damage to the airplane.
(1) For HPC stage 8-10 spool, P/N 1694M80G04, all serial numbers (S/Ns), or HPC stage 8-10 spool, P/N 1844M90G01 or 1844M90G02, with a S/N listed in Figure 1 to paragraph (e) of this AD; perform an eddy current inspection (ECI) or ultrasonic inspection (USI) of the stage 8 aft web upper face, after reaching 8,000 cycles since new (CSN), but, before exceeding 9,000 CSN, or within 500 cycles in service after the effective date of this AD, whichever occurs later.
| Part Nos. | Serial Nos. | |||||
| 1844M90G01 | GWN005MF | GWNBK753 | GWNBS077 | GWNBS497 | GWNBS724 | |
| GWN005MG | GWNBK754 | GWNBS078 | GWNBS499 | GWNBS794 | ||
| GWN0087M | GWNBK841 | GWNBS079 | GWNBS500 | GWNBS810 | ||
| GWN0087N | GWNBK842 | GWNBS080 | GWNBS501 | GWNBS811 | ||
| GWN00DGK | GWNBK843 | GWNBS081 | GWNBS502 | GWNBS812 | ||
| GWN00DGL | GWNBK844 | GWNBS157 | GWNBS609 | GWNBS813 | ||
| GWNBJ992 | GWNBK952 | GWNBS158 | GWNBS610 | GWNBS814 | ||
| GWNBK667 | GWNBK953 | GWNBS159 | GWNBS611 | GWNBS910 | ||
| GWNBK674 | GWNBK954 | GWNBS160 | GWNBS612 | GWNBS911 | ||
| GWNBK675 | GWNBK955 | GWNBS266 | GWNBS613 | GWNBS912 | ||
| GWNBK743 | GWNBK956 | GWNBS267 | GWNBS614 | GWNBS914 | ||
| GWNBK744 | GWNBK957 | GWNBS268 | GWNBS721 | GWNBS915 | ||
| GWNBK751 | GWNBK958 | GWNBS269 | GWNBS722 | GWNBS982 | ||
| GWNBK752 | GWNBK959 | GWNBS270 | GWNBS723 | GWNBS983 | ||
| 1844M90G02 | GWN00C2T | GWN01C5N | GWN02N8D | GWN03RTM | GWN04E21 | |
| GWN00C2V | GWN01GE2 | GWN02T3R | GWN03RTP | GWN04GHT | ||
| GWN00G2N | GWN01GE3 | GWN02WGM | GWN040RL | GWN04GHW | ||
| GWN00G2P | GWN01GE4 | GWN0311K | GWN040RM | GWN04GJ0 | ||
| GWN00PFP | GWN01GE6 | GWN035PP | GWN040RN | GWN04JW6 | ||
| GWN00PFR | GWN01WH1 | GWN038TD | GWN040RP | GWN04JW7 | ||
| GWN00T2N | GWN02688 | GWN039TG | GWN04202 | GWN04JW8 | ||
| GWN00YHV | GWN02689 | GWN03G2R | GWN0435W | GWN04L7K | ||
| GWN0125G | GWN0268A | GWN03G2W | GWN04360 | GWN04L7L | ||
| GWN0125H | GWN02DP2 | GWN03G30 | GWN04361 | GWN04MT7 | ||
| GWN0166K | GWN02DP3 | GWN03JPC | GWN04362 | GWN04MT8 | ||
| GWN01C5K | GWN02F9F | GWN03JPD | GWN04ATG | GWNBS984 | ||
| GWN01C5L | GWN02F9G | GWN03N8P | GWN04ATH | |||
| GWN01C5M | GWN02L9T | GWN03N8R | GWN04E20 |
(2) For all HPC stage 8-10 spools, P/N 1694M80G04, 1844M90G01, or 1844M90G02, perform an ECI of the stage 8 aft web upper face of the HPC stage 8-10 spool at each shop visit.
(3) Remove from service any HPC stage 8-10 spool that fails the inspection required by paragraphs (e)(1) or (e)(2) of this AD, and replace with a spool eligible for installation.
After the effective date of this AD, do not re-install into any engine, any HPC stage 8-10 spool, P/Ns 1694M80G04, 1844M90G01, or 1844M90G02, unless the spool has passed an ECI of the stage 8 aft web upper face as specified in paragraph (e)(1) or (e)(2) of this AD.
For the purpose of this AD, an engine shop visit is the induction of an engine into the shop for maintenance during which the compressor discharge pressure seal face is exposed.
