Rolls-Royce issues Newsflash regarding replacement probes on Pearl engine
Effectivity: Global 5500 and Global 6500 aircraft
ATA 77
By: Bruce Peever – Technical Services
Rolls-Royce has recently issued Newsflash Pearl15 NF2022-01 concerning an ongoing campaign to replace Turbine Gas Temperature (TGT) probes manufactured by a specific vendor on the BR700-710 D5-21 (Pearl) engine. The silver brazing material that was used by this vendor can contribute to a buildup of electrically conductive material across the ceramic insulator surface of the junction box housing. This can cause a low TGT reading (up to 100 degrees Celsius versus actual) resulting in an Engine Indicating and Crew Alerting System (EICAS) Do Not Dispatch message.
This campaign affects the following BR700-710D5-21 Engines SN 56008 to 56044, 56047 to 56056, 56058 to 56093, 56098 and 56099.
TGT probe P/N 8TC97AAB1 with silver brazing carries the capital letter “M” in the centre of the serial number. Example: S/N 202956M6367
TG T probe P/N 8TC97AAB1 with non-silver brazing carries the capital letter “N” in the centre of the serial number. Example: S/N 202956N0016
To prevent operational issues, the TGT probes with silver brazing are recommended to be exchanged at the next planned engine maintenance opportunity as per Non-Modification Service Bulletin (NMSB) BR700-77-900718.
The Rolls-Royce newsflash asks operators to please contact the Rolls-Royce Campaigns Team at onwing-campaigns-rrd@rolls-royce.com to schedule the incorporation of this NMSB. Please try to contact the campaigns team at least four (4) weeks prior to your scheduled down time.
When emailing the Campaigns Team, please include your aircraft and engine serial numbers, planned dates for the engine maintenance, and location. The Rolls-Royce Campaigns Team will place your aircraft on the schedule and confirm the parts availability two (2) weeks prior to your scheduled down time. In case of any down time change or cancellation, please inform the Rolls-Royce Campaigns Team as soon as possible.
For more information about this campaign, please refer to Rolls-Royce Newsflash Pearl15 NF2022-01 and RR NMSB BR700-77-900718 or contact your Rolls-Royce Regional Customer Manager.