AIRWORTHINESS REQUIREMENTS 

# TEMPORARY REVISION 2A−48 

# C

Jul 06/12 TR# 2A−48 Airworthiness Requirements Part 2 of Maintenance Requirements Manual Appendix A − Certification Maintenance Requirements Page 1 of 3 The contents of this Temporary Revision have been approved by the Chief, Engineering (or designate), National Aircraft Certification Branch, Transport Canada Civial Aviation
Date June 28, 2012 . Signed Remy Knoerr .



### FILING INSTRUCTIONS: Insert this Temporary Revision (TR) 2A−48 facing page 2A−8, in Part 2 of the Maintenance Requirements Manual (MRM). Record the incorporation of this Temporary Revision on the 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 add new CMR TASK NUMBERS; C27−50−111−15 and C27−50−111−17.AIRWORTHINESS REQUIREMENTS 

# TEMPORARY REVISION 2A−48 

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Jul 06/12 TR# 2A−48 Airworthiness Requirements Part 2 of Maintenance Requirements Manual Appendix A − Certification Maintenance Requirements Page 2 of 3 TASK

NO. TASK DESCRIPTION TASK INTERVAL CMR Category (*) or (**) C27−50−111−15 Restoration (seal and bearing replacement) of the inboard flap actuators EFFECTIVITY: IB Flap Actuators: P/N 601R93101−23, −25 (P/N 852D100−23, −25) PHASE−IN: (calculated from the time an actuator became a 601R93101−23, −25 by upgrade or since new, until the issue date of TR 2A−48 (Jul 06/12)): 1. For flap actuators with less than 6000 Flight Cycles (FC), do the restoration no later than 10000 FC, and every 10000 FC thereafter. 2. For flap actuators with 6000 FC to 10000 FC, do the restoration within 4000 FC but no later than 12000 FC, and every 10000 FC thereafter. 3. For flap actuators with 10000 FC to 12000 FC, do the restoration within 2000 FC but no later than 13000 FC, and every 10000 FC thereafter. 4. For flap actuators with more than 12000 FC, do the restoration within 1000 FC, and every 10000 FC thereafter. NOTE: 1. Replace the following items at the restoration: 1. P/N 852SC184−01, 852SC185−01 and 852SC186−01 (pinion seals). 2. P/N SA13588−1 and SA13589−1 (needle roller bearings). 3. P/N SA13408−1 (retaining rings). 4. P/N 999845−01 (teflon gaskets). 2. Actuators upgraded per EATON Service Bulletin SB852D100−27−04 meet the intent of this restoration task. The next restoration shall be accomplished in accordance with the PHASE−IN. 10000 Flight Cycles or 144 Months (*)AIRWORTHINESS REQUIREMENTS 

# TEMPORARY REVISION 2A−48 

# C

Jul 06/12 TR# 2A−48 Airworthiness Requirements Part 2 of Maintenance Requirements Manual Appendix A − Certification Maintenance Requirements Page 3 of 3 TASK

NO. TASK DESCRIPTION TASK INTERVAL CMR Category (*) or (**) C27−50−111−17Restoration (seal and bearing replacement) of the outboard flap actuators EFFECTIVITY: OB Flap Actuators: P/N 601R93103−23, −24 (P/N 853D100−23, −24) OB Flap Actuators: P/N 601R93104−23, −24 (P/N 854D100−23, −24) PHASE−IN: (calculated from the time an actuator became a 601R93103−23, −24 or 601R93104−23, −24 by upgrade or since new, until the issue date of TR 2A−48 (Jul 06/12)): 1. For flap actuators with less than 6000 Flight Cycles (FC), do the restoration no later than 10000 FC, and every 10000 FC thereafter. 2. For flap actuators with 6000 FC to 10000 FC, do the restoration within 4000 FC but no later than 12000 FC, and every 10000 FC thereafter. 3. For flap actuators with 10000 FC to 12000 FC, do the restoration within 2000 FC but no later than 13000 FC, and every 10000 FC thereafter. 4. For flap actuators with more than 12000 FC, do the restoration within 1000 FC, and every 10000 FC thereafter. NOTE: 1. Replace the following items at the restoration: 1. P/N 852SC184−01, 852SC185−01 and 852SC186−01 (pinion seals). 2. P/N SA13588−1 and SA13589−1 (needle roller bearings). 3. P/N SA13408−1 (retaining rings). 4. P/N 999845−01 (teflon gaskets). 2. Actuators upgraded per EATON Service Bulletin SB853D100−27−04 or SB854D100−27−01 meet the intent of this restoration task. The next restoration shall be accomplished in accordance with the PHASE−IN. 10000 Flight Cycles or 144 Months (*)