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# ••• Transport

Canada Transports

Canada TP 7245E 

# I 1/3 CF-2009-42R1 

### L.._-j Issue Date 

### 14 May 2010 

# AIRWORTHINESS, DIRECTIVE ~~'i.:f~'~R~u~='181~l1i~~cg~ii~~)

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,,~dbythe ContinuingAirwO<1hiness Division(AAROG),NafionalAircraftce~c.a~on 8ranch. T,.o'pon Canada. Ortawa, '~Iephon. 613 952-4357. Number: Subject: Effective; Revision: Applicability:

Compliance: Background:

Corrective Actions: CF-2009-42R1 

### I

Hydraulic Accumulators - Screw Cap/End Cap Failure , 3June 2010

, Supersedes Airworthiness Directive (AD) CF-2009-42, dated 16 November 2009. Bombardier Inc. Models: Cl-215-1A10 (Cl-215) -Serial Numbers 10011throU9h1990 Cl-215-6811 (Cl-215T)- Serial Numbers 1056through 1125 Cl-215-6811 (CL-415)
- Serial Numbers 2001 through 2990 As indicated below, unless already aceomplishe,d. Seven cases of ,on-ground hydraulic accumulator screw cap or end cap failure have been experienced on Cl-600-2B 19 (CRJ) aircraft, resulting in loss ofthe associated hydraulic system and high-energy impact damage to adjacent systemlsand structure. To date, the lowest number offlight cycles accumulated atthetime offailure has bebn 6991. Although there have been no failures to date on any CL-215-1A10 (CL-215) or CL-215"6B11 (CL-215T and CL-415) aircraft, similar accumulators, Part Number (PIN) 08-8423-010 (MS28700- 3), to those installed on the CL-600-2819, arh installed on the aircraft listed in the Applicability section ofthis directive. A detailed analysis of the systems and structure in the potential line of trajectory of a failed screw caplend cap for each accumulator has bee~ conducted. It has identified that the worst-case scenarios would be impact damage to various components, potentially resulting in fuel spillage, uncommanded flap movement, or loss ofaileron control. This directive mandates repetitive inspections :ofthe accumulators for cracks and replacement of any accumulator inwhich a crack isdetected. This revision clarifies thetext ofthe directive, iny1udingthe PIN ofthe affected accumulators, Part I: Records Check Within 50 hours air time after the effectiye date of the original issue of this directive (26 November 2009): Determine and record the number of flight cycles accumulated by each of the accumulators, PIN 08-8423-010 (MS28700-3). installed on the airCraft [i.e. accumulators for the brake (CL-215-1A10 and CL-215-6811), aileron (CL215-6B11). elevator (CL215-6811) and rudder (CL215--6811)j. Proceed to Part IIofthis directive. Part II: Initial Ultrasonic Inspection A. Inspection Schedule: CL·215-1A 10 (CL-215) and CL-215--6811 (CL-215T) 

# Canada 1) For each accumulator, PIN 08-8423-010 (MS28700-3), with more than 875 flight cycles, inspect the accumulator within 125f1jg~tcycles after the effective date ofthe original issue of this directive (26 November 2009)i, in accordance with Part II. Paragraph C of this
, PufSuonlto CAR 202,~' the registered owner01a Canadian airmfi shall. within so""o da~, notjli itheMini.tor Inwriting 01MycMnge of hisor horname c>r address 

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# I No. 

### CF·2009-42R1 

# ~.

2)


### 3) directive.
For each accumulator, PIN 08-8423

# l010 (MS28700-3), with 875 or less flight cycles, Inspect the accumulator before it has ,accumulated 1000 night cycles, in accordance wilh Part II, 

### Paragraph C of this directive. 

### I Ifit is nol possible to determine theflight cycles accumulated foran accumulator, PIN 08- 8423-010 (MS28700-3), inspect the adcumulator within 125 flight cycles after the effective of the original issue of this directive (26 November 2009). in accordance with Part II, Paragraph C of this directive. S, Inspection Schedule: CL-215-6B11 (CL-415)

### I 1) For each accumulator, PIN 08-8423-0~O (MS28700-3), with more than 750 flight cycles, inspect the accumulator within 250 flight cycles after the effective date of the original issue of this directive (26 November 2009)! in accordance with Part 11,Paragraph C of this directive. I 2) For each accumulator, 

### PIN 08-8423-910 (MS28700-3), with 750 or less flight cycles, inspect the accumulator before it has accumulated 1000 flight cycles, in accordance with Part II, Paragraph Cofthis directive. I 3) If it is not possible to detennine thle Might cycles accumulated for an accumulator, PIN 08-8423-010 (MS28700-3), inspect the accumulator within 250 flight cycles after the effective date ofthe original issue ofthis directive (26 November 2009), in accordance with Part II, Paragraph Cofthis directive. 

### I C, Inspection Procedure Inspect each accumulator, PIN 08-8423-010

# I(MS28700-3), in accordance with Part B of the Accomplishment Instructions in the applicable S6 listed below, or later revisions approved by the Chief, Continuing Airworthiness, Transport Can~da.

Model Service Bulletin Date CL-21S-1A10 (CL-215) S!3215 541, Revision 1 12 March 2010 CL-215-6611 (CL-215T) S!3215-3155, Revision 1 12 March 2010 CL-21S-6611 (CL-415) S8 215--4414, Revision 1 12 March 2010 Note: Inspection in accordance with Part B oft~e Accomplishment Instructions in the original issue of S8 215-541, SB 215-3155 or S8 215- 4414 (all dated 9 July 2009), as applicable, also meets the intent of Part IIofthis directivej 1) 

### 2) Ifthere is no indication of a crack, proci:ed to Part III ofthis directive forsubsequent repeat ultrasonic inspection requirements. 

# I
Ifthere is an indication of acrack, repla'cethe accumulator before further flight. Inspect the replacement accumulator in accorda~ce with Part n and Part III of this directive, as applicable. 

### I Part III: Repeat Ultrasonic Inspections For each accumulator, PIN 08-8423-010 (MS'2870D-3), in which no crack has been previously detected, ultrasonically re-inspect the accum~lator within 750 flight cycles after each previous ultrasonic inspection, in accordance with Part 8 of the Accomplishment Instructions in the applicable S8 listed below, or later revisions 

### Iapproved by the Chief, Continuing Airworthiness, Transport Canada.

Model 

## IService Bulletin Date CL-215-1A 10(CL-215) S~ 215541, Revision 1 12 March 2010 CL-215-6B11 (CL-215T) S!3215-3155, Revision 1 12 March 2010 CL-215-fiB11 (CL-415) S8 215-1414, Revision 1 12 March 2010 , 

### I Note: Inspection in accordance with Part B ofthe Accomplishment Instructions in the original issue of 58 215-541, S8 215-3155 or S8 215- 4414 (all dated 9 July 2009), as applicable, also

# I~~. CF·2009·42R1

Authorization:



### Contact: meets the intent of Part III ofthis directive. 1) Ifthere is no indication ofa crack, proq:!ed to Part III ofthis directive forsubsequent repeat ultrasonic inspection requirements.
2) Ifthere is an indication of a crack, replace the accumulator before further flight. Inspect the replacement accumulator in accordante with Part II and Part III of this directive, as appiicable I For Minister ofTransport, Infrastructure and Coh,munities I 

### OR1GIN;\L STGNED BY Derek Ferguson Chief, Continuing Airworthiness Mr. Richard Topham, Continuing Ailworthin1ess, Ottawa, telephone 613-952-4357, facsimile 613-996-9178 or e-mail CA\lVlJVEBFeedback@tt.9C.caoranyTransport Canada Centre I