Fri, Jul 16, 2021
AD 2021-14-03 Prompted By Reports Of HPT Stage 1 Blades Failing In Service
The FAA is adopting a new airworthiness directive (AD) for certain Rolls-Royce Deutschland Ltd. & Co KG (RRD) BR700-715A1-30, BR700-715B1-30, and BR700-715C1-30 model turbofan engines.
This AD was prompted by reports of HPT stage 1 blades failing in service due to sulphidation and subsequent crack initiation. This AD requires removal and replacement of the HPT stage 1 blade and HPT stage 1 blade damper. The FAA is issuing this AD to address the unsafe condition on these products. This AD is effective August 19, 2021.
Supplementary Information: The FAA issued a notice of proposed rulemaking (NPRM) to amend 14 CFR part 39 by adding an AD that would apply to certain RRD BR700-715A1-30, BR700-715B1-30, and BR700-715C1-30 model turbofan engines. The NPRM published in the Federal Register on November 13, 2020 (85 FR 72608). The NPRM was prompted by reports of HPT stage 1 blades failing in service due to sulphidation and subsequent crack initiation, due to contamination of the blade shank passing by the blade damper. In the NPRM, the FAA proposed to require removal and replacement of the HPT stage 1 blade and HPT stage 1 blade damper. The FAA is issuing this AD to address the unsafe condition on these products.
The European Aviation Safety Agency (EASA), which is the Technical Agent for the Member States of the European Community, has issued EASA AD 2018-0194, dated September 4, 2018 (referred to after this as “the MCAI”), to address the unsafe condition on these products.
The MCAI states:
- Occurrences have been reported on RRD BR700-715 engines where certain HP turbine stage 1 blades failed in service. Investigation of these events showed that these were caused by sulphidation and subsequent crack initiation, due to contamination of the blade shank passing by the blade damper.
- This condition, if not corrected, could lead to further HP turbine stage 1 blade failures, possibly resulting in engine in-flight shut-down and consequent reduced control of the aeroplane. To address this potential unsafe condition, RRD published the NMSB to provide instructions to replace the affected assembly.
- For the reasons described above, this [EASA] AD requires determination of the engine configuration and, depending on findings, removal of the engine from service to replace the affected assembly.
You may obtain further information by examining the MCAI in the AD docket at https://www.regulations.gov by searching for and locating Docket No. FAA-2020-1025.
More News
Also: Horizon Picks P&W PT6A, Army Buys 3 EagleNXT, First Hybrid-Electric Regional, Army Selects AEVEX Anduril Industries’ YFQ-44A Collaborative Combat Aircraft was flown>[...]
While Flying North Along The Beach At About 300 Ft Above Ground Level, The Pilot Reported That The Engine RPM Dropped To About Idle On September 28, 2025, at 1126 eastern daylight >[...]
Aero Linx: European Association of Aviation Training and Educational Organisations (EATEO) Welcome to the “ European Association of Aviation Training and Education Organizati>[...]
On-Course Indication An indication on an instrument, which provides the pilot a visual means of determining that the aircraft is located on the centerline of a given navigational t>[...]
“It also gives us the hard data we need to shape requirements, reduce risk, and ensure the CCA program delivers combat capability on a pace and scale that keeps us ahead of t>[...]
Airborne-NextGen 11.04.25: Anduril YFQ-44A, Merlin SOI 2, UAV Rulemaking Stalled
See All