EASA AD No.: 2012-0230 

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EASA AIRWORTHINESS DIRECTIVE 

AD No.: 2012-0230 

Date: 30 October 2012 

Note: This Airworthiness Directive (AD) is issued by EASA, acting in accordance with Regulation 

(EC) No 216/2008 on behalf of the European Community, its Member States and of the 

European third countries that participate in the activities of EASA under Article 66 of that 

Regulation.

This AD is issued in accordance with EU 748/2012, Part 21A.3B. In accordance with EC 2042/2003 Annex I, Part M.A.301, the 

continuing airworthiness of an aircraft shall be ensured by accomplishing any applicable ADs. Consequently, no person may operate an 

aircraft to which an AD applies, except in accordance with the requirements of that AD, unless otherwise specified by the Agency [EC 

2042/2003 Annex I, Part M.A.303] or agreed with the Authority of the State of Registry [EC 216/2008, Article 14(4) exemption]. 

Design Approval Holder’s Name: 

Rolls-Royce Deutschland Ltd & Co KG

Type/Model designation(s): 

BR700-715 engines

TCDS Number: EASA.E.023 

Foreign AD: Not applicable 

Supersedure: None 

ATA 72 Engine – High Pressure Compressor Rotor Disc Assembly – 

Removal 

Manufacturer(s): Rolls-Royce Deutschland (RRD) Ltd & Co KG 

Applicability: BR700-715A1-30, BR700-715B1-30 and BR700-715C1-30 engines, all serial 

numbers. 

These engines are known to be installed on, but not limited to Boeing 717 

aeroplanes. 

Reason: Silver chloride-induced stress corrosion cracking was identified during overhaul 

of a BR700-715 engine, on the High Pressure Compressor (HPC) stages 1 to 6 

rotor disc assembly. Subsequent evaluation concluded that the affected part life 

limitation values declared in the engine Time Limits Manual cannot be 

supported for high cyclic life HPC discs. 

This condition, if not corrected, could lead to uncontained HPC disc failure, 

possibly resulting in damage to, and/or reduced control of the aeroplane. 

To address this potential unsafe condition, RRD issued Alert Non-Modification 

Service Bulletin (NMSB) SB-BR-700-72-A900401 to instruct a one-time 

removal from service of HPC stage 1 to 6 rotor disc assemblies before 

exceeding thresholds, as applicable to engine model and type of mission, 

identified in that NMSB. 

For the reasons described above, this AD requires a one-time removal from 

service of the affected parts and their replacement with a serviceable part. 

Effective Date: 06 November 2012 
EASA AD No.: 2012-0230 

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Required Action(s) 

and Compliance 

Time(s): 

Required as indicated, unless accomplished previously: 

Note 1: For the purpose of this AD, flight cycles (FC) means total actual engine 

cycles since new without any pro-rata calculations applied for different 

flight missions. Guidance for the total actual engine cycle calculation, 

for the purpose of this AD, is given in the Notice to Operators BR715 

engines NTO No: 184, dated 25 October 2012. 

BR700-715A1-30 Engines operated under Hawaiian Flight Mission only: 

(1) After the effective date of this AD, before exceeding 16 000 flight cycles 

accumulated since new by the HPC stage 1 to 6 rotor disc assembly, 

replace the HPC stage 1 to 6 rotor disc assembly with a serviceable part in 

accordance with the instructions of RRD Alert NMSB SB-BR-700-72-

A900401. 

BR700-715A1-30, BR700-715B1-30 and BR700-715C1-30 Engines (All 

Flight Missions except Hawaiian Flight Mission): 

(2) After the effective date of this AD, before exceeding 14 000 FC 

accumulated since new by the HPC stage 1 to 6 rotor disc assembly, 

replace the HPC stage 1 to 6 rotor disc assembly with a serviceable part in 

accordance with the instructions of RRD Alert NMSB SB-BR-700-72-

A900401. 

(3) For engines, listed in the Table 1 of this AD, with a HPC stage 1 to 6 rotor 

disc assembly, which on the effective date of this AD, has already 

accumulated or exceeded 14 000 FC since new, within the compliance 

time identified in Table 2 of this AD, replace the HPC stage 1 to 6 rotor disc 

assembly with a serviceable part in accordance with the instructions of 

RRD Alert NMSB SB-BR-700-72-A900401. 

Table 1 Engine serial numbers (S/N) affected by the paragraph (3) of this AD 

Engine S/N 13125, 13153, 13164, 13172, 13173, 13180, 13251, 13282, 

13288, 13302, 13321,13326 and 13330. 

Table 2 Compliance time 

FC accumulated since new by the 

HPC stage 1 to 6 rotor disc 

assembly 

Compliance time after the 

effective date of this AD 

Equal to or more than 14 000 FC 

but less than 15 500 FC Within 300 FC 

Equal to or more than 15 500 FC Within 40 FC 

Note 2: A one-time replacement of HPC Stage 1 to 6 rotor disc assembly as 

required by paragraphs (1), (2) and (3) of this AD terminates 

requirement of this AD. 

Ref. Publications: RRD Alert NMSB SB-BR700-72-A900401 dated 25 October 2012. 

The use of later approved revisions of this document is acceptable for 

compliance with the requirements of this AD. 

RRD Notice to Operators BR715 engines NTO No: 184, dated 25 October 

2012. 

Remarks: 1. If requested and appropriately substantiated, EASA can approve 

Alternative Methods of Compliance for this AD. 

2. Based on the required actions and the compliance time, EASA have 

decided to issue a Final AD with Request for Comments, postponing the 
EASA AD No.: 2012-0230 

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public consultation process until after publication. 

3. Enquiries regarding this AD should be referred to the Safety Information 

Section, Executive Directorate, EASA. E-mail: ADs@easa.europa.eu. 

4. For any question concerning the technical content of the requirements in 

this AD, please contact: 

Rolls-Royce Deutschland Ltd & Co KG, 

Eschenweg 11, 15827 Dahlewitz, Germany. 

Telephone: +49 (0) 33 7086 1200; Fax: +49 (0) 33 7086 1212. 

E-mail: rrd.tech.help@rolls-royce.com.