| SPECIAL
AIRWORTHINESS INFORMATION BULLETIN |
Aircraft
Certification Service
Washington, DC
U.S. Department of Transportation
Federal Aviation Administration |
| NE-10-07 |
November 2, 2009
This is information only. Recommendations
aren’t mandatory.
Introduction
This Special Airworthiness Information Bulletin (SAIB) alerts you,
owners, operators, and certificated repair facilities of TCM series
engines with certain Superior Air Parts, Inc. (SAP) investment cast
cylinder assemblies to help identify the cylinder assemblies listed in
airworthiness directive (AD) 2009-16-03. At this time, the
airworthiness concern is not an unsafe condition that would warrant AD
action under Title 14 of the Code of Federal Regulations (14 CFR) part
39.
Background
On August 5, 2009, we issued AD 2009-16-03 to require inspecting
certain TCM engines with SAP cylinders installed. In AD 2009-16-03,
paragraph (f), we provided additional information to aid in identifying
affected part number (P/N) cylinders without having to remove the
cylinder from the engine. Paragraph (f) states: “Look at the cylinder
head for the P/N SAC 52001 I or SAC 55001 I, and the word AMCAST.”
Since we issued that AD, SAP has informed us that the affected
investment cast cylinder heads might have the letters “CP” and a
revision marking as shown in the following Table 1 instead of the word
“AMCAST.”
Table 1 – Foundry and Revision Markings on Affected Cylinder Head Assemblies
| TCM Engine Models |
Foundry Marking |
Revision Marking |
| 520 series |
AMCAST
CP
|
None
-B, -D, or -J
|
| 550 series |
AMCAST
CP
|
None
-B, -D, or -J
|
The same foundry made all of the SAP investment cast cylinder heads.
After Citation Precision bought the foundry in 1998, the top of the
cylinder heads were marked “CP.”
Table 2 – Manufacturing Date of Affected Cylinder Head Assemblies
| Foundry Markings |
Revision Marking |
Manufacturing Date |
| AMCAST |
None |
1994 thru Sept. 1998 |
| CP |
B |
Sept. 1998 thru March 2000 |
| CP |
D |
April 2000 thru June 2006 |
| CP |
J |
July 2006 thru Jan. 2007 |
Recommendations
If your records show that your TCM engine has an SAP cylinder assembly,
and you cannot see the part number on the bottom flange of the cylinder
assembly, you can remove the valve cover and look for P/N SAC 52001 I
and the word “AMCAST” or the letters “CP.” If either are present, your
cylinder assembly is affected by AD 2009-16-03.
For Further Information Contact
Peter W. Hakala, Aerospace Engineer, FAA, Special Certification Office,
Rotorcraft Directorate, 2601 Meacham Blvd., Ft. Worth, TX 76137-4298;
telephone 817-222-5145; fax 817-222-5785 E-mail: peter.hakala@faa.gov
For Related Service Information Contact
Carl Johnson, Superior Air Parts, Technical Support, 621 S. Royal Lane,
Coppell, Texas 75019; telephone 972-829-4689; e-mail:
cjohnson@superiorairparts.com