Service Bulletin

06 July 2009 2000–55–013

Page 1 of 6

ATA CHAPTER: 55

STABILIZERS – HORIZONTAL STABILIZER – INSPECTION OF THE UPPER SPAR CAP

FOR CORROSION

Mod No. 6371

1. PLANNING INFORMATION

A. EFFECTIVITY

(1) Aircraft:

Aircraft Mfg. Serial No’s SAAB 2000 – 004 thru – 063.

(2) Spares: Not affected.

B. REASON

Corrosion has been found on the upper spar cap of the horizontal stabilizer.

The areas where the harnesses are located and wired through the lightening holes are to be

addressed.

The upper spar cap is a primary structural element and is important to the structural integrity of the

horizontal stabilizer interface. Corrosion damage can be regarded as a starting point for future crack

propagation.

Implementation of this Service Bulletin will minimize possible future cost and time consuming

structural repairs.

C. DESCRIPTION

This Service Bulletin gives instructions for:

– Detailed visual inspection of the LH and RH horizontal stabilizer

– Inspection of the harness installed in the adjacent area

– Installation of convoluted tube on the harness.

D. COMPLIANCE

Mandatory.

To be performed within 1 year from initial release of this Service Bulletin.

This Service Bulletin is under EASA consideration for an Airworthiness Directive.

E. APPROVAL

The technical content of this Service Bulletin is approved under the authority of DOA nr.

EASA.21J.066.

F. MANPOWER

Estimated time to complete this Service Bulletin is:

1 persons required.

Total manhours: 2

Elapsed time (hours): 2

Labour cost at operators expense.
Service Bulletin

06 July 2009 2000–55–013

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G. MATERIAL – COST AND AVAILABILITY

Local supply.

H. TOOLING

(1) Access platform, approximately height 4 m ((13.1 ft.).

(2) Warning sign, ”DO NOT OPERATE THE FLIGHT CONTROLS”.

I. WEIGHT AND BALANCE

None.

J. ELECTRICAL LOAD DATA

Not affected.

K. REFERENCES

Aircraft Maintenance Manual (AMM) 06–43–00–00

Corrosion Prevention Manual (CPM) 20–20–10

55–10–00

L. OTHER PUBLICATIONS AFFECTED

Not affected.

2. ACCOMPLISHMENT INSTRUCTIONS

A. JOB SET–UP

(1) Before you start the SB, make sure:

– The local supply items listed in the Service Bulletin are available

– The documentation is available.

(2) Make the aircraft safe for maintenance

(a) Put up the warning sign ””DO NOT OPERATE THE FLIGHT CONTROLS” in the flight

compartment.

(b) On the LH circuit breaker panel 9VU, open tag and safety the circuit breakers:

LABEL POS C/B

ELEVATOR L CTL 1 G–11 7CM

ELEVATOR L CTL 2 BACK UP G–12 17CM

ELEVATOR R CTL 1 G–9 7CP

TRIM PITCH ROLL G–5 13CC

(c) On the RH circuit breaker panel 10VU, open tag and safety the circuit breakers:

LABEL POS C/B

ELEVATOR L CTL 2 N–10 8CM

ELEVATOR R CTL 2 N–8 8CP

ELEVATOR EMER TRIM N–9 4CS
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06 July 2009 2000–55–013

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(3) Get access to the inspection area

(a) Put the access platform in position.

(b) Remove the trailing edge panels (Ref. AMM 06–43–00–00):

For the LH stabilizer:

– 332CT

– 332DB.

For the RH stabilizer:

– 342CT

– 342DB.

B. INSPECTION

REF. FIG. 1

NOTE: The procedure for inspection of the LH stabilizer is described. The inspection for the RH

side is the same.

(1) Clean the area that is to be inspected.

(2) Do a detailed visual inspection of the lower (LH) and upper (RH) part (REF. FIG. 1) of the

stabilizer spar cap (1) for corrosion (Ref. CPM 20–20–10).

(a) If no corrosion is found, continue with step (3).

(b) If any corrosion is found, please contact Saab for further action:

Saab Aerotech

Aircraft Services Division

SE–581 88 Linköping

Service Engineering

E–mail: Saab2000.techsupport@saabgroup.com

Fax: +46 13 18 4874

(3) Inspect and make sure that there is no chafing or damage on the harness.

C. CORRECTIVE ACTION

REF. FIG. 1

(1) Install the convoluted tube on the harness and secure with tie–wraps.

(2) Make sure there is clearanse between the spar cap and the harnesses/convoluted tube. If

necessary, adjust the position of the harnesses.

(3) Apply corrosion prevention compound to the inspected area (Ref. CPM 55–10–00).

D. JOB CLOSE–UP

(1) Remove all the tools and equipment from the work area. Make sure the work area is clean.

(2) Close the access

(a) Install the trailing edge panels:

For the LH stabilizer:

– 332CT

– 332DB.

For the RH stabilizer:

– 342CT

– 342DB.
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06 July 2009 2000–55–013

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(3) Remove the access platform.

(4) Close the circuit breakers

(a) On the LH circuit breaker panel 9VU, remove the tags and close the circuit breakers:

LABEL POS C/B

ELEVATOR L CTL 1 G–11 7CM

ELEVATOR L CTL 2 BACK UP G–12 17CM

ELEVATOR R CTL 1 G–9 7CP

TRIM PITCH ROLL G–5 13CC

(b) On the RH circuit breaker panel 10VU, remove the tags and close the circuit breakers:

LABEL POS C/B

ELEVATOR L CTL 2 N–10 8CM

ELEVATOR R CTL 2 N–8 8CP

ELEVATOR EMER TRIM N–9 4CS

(5) Remove the warning sign ””DO NOT OPERATE THE FLIGHT CONTROLS” from the flight

compartment.

3. MATERIAL INFORMATION

A. Local supply

Item Part Number Qty Nomenclature Designation Remarks

– HCTE–0875–0–BLA

CK

200 mm

(7.9 in)

Convoluted tubing Harness

installed at the

rear spar of the

LH and RH horizontal stabilizer

–

– – 4 Tie–wrap – –
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1 AREA TO BE

INSPECTED

CONVOLUTED

TUBE

HARNESS

B18359

LH SIDE VIEW LOOKING FWD 

Horizontal Stabilizer – Inspection

FIG. 1
Service Bulletin

Date Month Year

Revison X, Date Month Year

2000–XX–XXX

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