AIRWORTHINESS REQUIREMENTS 

# TEMPORARY REVISION 2A−58 

# C

Jan 31/14 TR# 2A−58 Airworthiness Requirements Part 2 of Maintenance Requirements Manual Appendix A − Certification Maintenance Requirements 1 of 4 Page The contents of this Temporary Revision have been approved by the Chief, Engineering (or designate), National Aircraft Certific ation Branch, Transport Canada Date January 31,2014 Signed Remy Knoerr


### FILING INSTRUCTIONS: Insert this Temporary Revision (TR) 2A−58 facing page 2A−5, in Part 2 of the Maintenance Requirements Manual (MRM) and discard CMR TASK C27−40−103−02 and CMR TASK C27−40−103−03 in Part 2 of the Maintenance Requirements Manual (MRM) Record the removal of CMR TASK C27−40−103−02 and CMR TASK C27−40−103−03 of this Temporary Revision on the yellow RECORD OF TEMPORARY REVISIONS sheet at the front of the MRM Part 2. Keep this Temporary Revision until normal revision service incorporates this information into the Maintenance Requirements Manual. DESCRIPTION: This Temporary Revision is issued to clarify CMR TASK C27−42−103−01 and discard CMR C27−40−103−02 and C27−40−103−03 in Appendix A in Part 2 of the Maintenance Requirements Manual (MRM). This Temporary Revision adds CMR TASK C27−40−103−05,AIRWORTHINESS REQUIREMENTS 

# TEMPORARY REVISION 2A−58 

# C

Jan 31/14 TR# 2A−58 Airworthiness Requirements Part 2 of Maintenance Requirements Manual Appendix A − Certification Maintenance Requirements 2 of 4 Page CERTIFICATION MAINTENANCE REQUIREMENTS

TASK

NO. TASK DESCRIPTION TASK INTERVAL CMR Category (*) or (**) C27−40−103−05 Restoration (Overhaul) of the HSTA EFFECTIVTY: P/N 601R92305−7 (SAGEM P/N 8396−5) and subs NOTE: 1. Replace the following items at the restoration: −Primary Housing: PN 8396−140 (Included in 8396−100) and subs −Secondary Housing: PN 261881804 (Included in 8396−2030) and subs −Secondary Spur Gear CH2: PN 261405307 and subs −Primary Pinion CH1: PN 8396−043 and subs −Secondary Pinion CH2: PN 8396−044 and subs 2. Perfom tasks listed below: −Functional check of the torque limiters −Detailed inspection of the secondary load path indicator −Special detailed inspection of the primary spur gear 9600 FH OR 8420 FC

W.C.F (*)AIRWORTHINESS REQUIREMENTS 

# TEMPORARY REVISION 2A−58 

# C

Jan 31/14 TR# 2A−58 Airworthiness Requirements Part 2 of Maintenance Requirements Manual Appendix A − Certification Maintenance Requirements 3 of 4 Page TASK

NO. TASK DESCRIPTION TASK INTERVAL CMR Category (*) or (**) C27−40−103−05 PHASE−IN: As follows or as mandated per AD: For HSTA S/N < 3000, without suffix "H"; a) 7300 FH from 31 JAN’14 and no later than 31 Mar’17, and no later than Cumulative Airtime of 9600 FH / 8420 FC, on Secondary Housing PN 261881804, whichever comes first; Or b) no later than TSN = 9600 FH / CSN = 8420 FC, whichever comes first. 9600 FH OR 8420 FC

W.C.F (*)AIRWORTHINESS REQUIREMENTS 

# TEMPORARY REVISION 2A−58 

# C

Jan 31/14 TR# 2A−58 Airworthiness Requirements Part 2 of Maintenance Requirements Manual Appendix A − Certification Maintenance Requirements 4 of 4 Page TASK

NO. TASK DESCRIPTION TASK INTERVAL CMR Category (*) or (**) C27−42−103−01 Detailed Inspection of the HSTA secondary load path indicator. NOTE: 1. The PHASE−IN compliance is as follows: For aircraft with 4500 HSTA flight hours or less, inspect at or before 5000 HSTA flight hours, and every 5000 flight hours thereafter. For aircraft with more than 4500 HSTA flight hours, inspect within the next 500 HSTA flight hours, and every 5000 flight hours thereafter. 2. Airworthiness Directive issued. 3. Credit can be taken when CMR 

### TASK C27−40−103−05 is performed. 5000 FH (*)