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SPECIAL INSTRUCTION NO. 114F-21 Pratt & Whitney A United Technologies Company SPECIAL INSTRUCTION NO. 114F-21 May 24, 2021 V2500 High Pressure Turbine Hubs - Require removal APPLICATION:
This Special Instruction is applicable to the stage 2 High Pressure Turbine Hub Part Number 2A4802 with Serial Numbers listed in this document.
Type Certificate Holder is International Aero Engines, AG (IAE AG). Pratt & Whitney is providing this data on behalf of IAE AG.
UTC/P&W PROPRIETARY INFORMATION This document contains proprietary information of United Technologies Corporation ("UTC") and/or of one or more of UTC's worldwide divisions, subsidiaries, and affiliates including Pratt & Whitney and UTC Aerospace Systems and/or of a supplier and/or partner to any of the foregoing UTC entities. The proprietary information set forth in this document is provided in confidence and solely for the purposes of supporting engine certification and providing applicable information regarding the proper use, maintenance, inspection, repair, and servicing and parts application of Pratt & Whitney engine products and services ("Purpose").
By accepting this document the recipient agrees to limit copying the document, or any information in it, solely for distribution within the recipient's company or to a third party to carry out the stated Purpose for the document and any information in it. You cannot possess, use, copy, or disclose this document or any information in it for any purpose other than that stated above, without UTC's express written permission. Violation of these restrictions may result in criminal and/or civil liability.
Neither this document nor any information in it may be disclosed to others, or used for any other purpose, including, without limitation, to design, create, develop, reproduce, manufacture or derive any design, part, product, material, process, modification, configuration change or repair, or obtain FAA or other government approval to do so.
If a Government agency or department intends to disclose any information, written notice should be given to: (1) VP and Counsel, Commercial Engines, Pratt & Whitney, 400 Main Street, East Hartford, CT 06108, U.S.A.; and (2) Intellectual Property Counsel, UTC Aerospace Systems, 1 Hamilton Road, Windsor Locks, CT 06096. U.S.A.
WARNING - This document contains technical data the export of which is or may be restricted by the Export Administration Act and the Export Administration Regulations (EAR), 15 C.F.R. parts 730-774. Diversion contrary to U.S. law is prohibited. The export, re-export, transfer or re-transfer of this technical data to any other company, entity, person, or destination, or for any use or purpose other than that for which the technical data was originally provided by P&W, is prohibited without prior written approval from P&W and authorization under applicable export control laws. EAR Export Classification identified on the following page(s).
Distribution Code Internal Reference NO. 6322 MTK EA 21VC210 SPECIAL DISTRIBUTION (2) PRATT & WHITNEY PROPRIETARY - Subject to the restrictions on the first page U.S. Export Classification: EAR ECCN EAR99 Page 1 of 3
SPECIAL INSTRUCTION NO. 114F-21
PRATT & WHITNEY PROPRIETARY - Subject to the restrictions on the first page U.S. Export Classification: EAR ECCN EAR99 Page 2 of 3
THE REASON FOR THIS SPECIAL INSTRUCTION:
On March 18, 2020 V16580 engine experienced an aborted take-off, a fracture of the High Pressure Turbine (HPT) stage 1 Hub and an uncontained event. The cause of fracture is an anomaly in the material. Recent findings require accelerated removal of certain suspect HPT hubs. The part number and serial number hubs listed in Table 1 of this document require removal from service within specified cyclic draw down limits and subsequent angle scan ultrasonic inspection per NMSB 72-0015.
APPROVAL:
Not applicable.
DESCRIPTION:
The purpose of this Special Instruction (SI) is to remove from service within specified cyclic draw down limits the HPT stage 2 Hub Part Number 2A4802 with Serial Numbers listed in this document and to subsequently perform angle scan ultrasonic inspection per NMSB 72-0015.
COMPLIANCE CATEGORY:
Category 3
Remove from service the HPT stage 2 Hubs with Serial Numbers listed in Table 1 within 385 cycles from the time of receipt of this SI and subsequently perform angle scan ultrasonic inspection per NMSB 72-0015.
REFERENCES:
A. ATA Locator – 72-45-31.
B. V2500-E5 Series Illustrated Parts Catalog, P&W Ref. PN 2A4385, Chapter/Section 72-45-31.
C. V2500-E5 Series Engine Shop Manual, P&W Ref. PN 2A4383, Chapter/Section 72-45-31.
D. V2500-E5-72-0015 NON-MODIFICATION SERVICE BULLETIN — ENGINE — HUB, HIGH PRESSURE TURBINE (HPT), STAGE 1 AND 2 — ANGLE SCAN ULTRASONIC INSPECTION TO FIND AN ANOMALY IN THE MATERIAL NECESSARY TOOLS:
See Engine Removal Task in AMM.
ADDED DATA:
A. Time to Accomplish Task: N/A.
B. Disposition of Hardware Removed: See Hardware Disposition Instructions below.
C. Consumables Required for task for each engine.
Part Name Part Number UPE
N/A N/A N/A ACCOMPLISHMENT INSTRUCTIONS:
1) Remove from service engines containing hubs with Serial Numbers listed in Table 1 within the cyclic draw down limits specified in the Compliance section above.
2) Accomplish inspection of HPT stage 2 Hub per NMSB 72-0015.
NOTE – Compliance with this SI in its entirety constitutes compliance with NMSB 72-0015. Hubs that are removed form service and are inspected per NMSB 72-0015 in accordance with this SI and are found acceptable will be marked as such per NMSB 72-0015.
Table 1. HPT stage 2 Hub Serial Number.
PKLBR37634 PKLBR83748
SPECIAL INSTRUCTION NO. 114F-21
PRATT & WHITNEY PROPRIETARY - Subject to the restrictions on the first page U.S. Export Classification: EAR ECCN EAR99 Page 3 of 3
MATERIAL INFORMATION:
A. The material data that follows is for each engine:
New P/N Qty Key Word Old P/N Instructions-Disposition Same 1 Hub 2A4802 See Hardware disposition
B. Parts Modification Conditions
Not applicable
C. Spare Parts Availability
(A) Contact Customer Fleet Director for spare part availability.
D. Data on Interchangeable Parts
Not applicable
INDUSTRY SUPPORT PROGRAM Contact Customer Fleet Director for Industry Support Program details.
HARDWARE DISPOSITION INSTRUCTIONS
Follow instructions in NMSB 72-0015.