AIRWORTHINESS DIRECTIVE
CAA-AD-050/2001
Date of issue:
June 07, 2001
ENGINE - BEARING - INSPECTION
Applicability: CFM International
CFM56-2, -2B, -3, -5B, -5C and -7B series turbofan engines with a No. 4
bearing, part number (P/N) 305-355-717-0, that has a serial number (SN) listed
in Table 1 of this AD installed. These engines are installed on, but not
limited to Airbus Industrie A319, A320, A321 and A340 series airplanes, Boeing
737 and KC135 series airplanes, and McDonnell Douglas DC8 series airplanes.
Effective date: June 11, 2001
Compliance: Required as indicated in FAA AD 2001-11-05.
Remarks: The compliance of
this AD must be recorded in Aircraft Logbook; where applicable the requirements
of this AD must be integrated into Aircraft Technical Documentation. Address
inquiries concerning this AD to: Civil Aviation Authority, Airworthiness
Division, Ruzyne Airport, 160 08 Prague 6, Czech Republic, tel: 420 2 33320922,
fax: 420 2 20562270.
Ing. Pavel MATOUŠEK
Director of
Airworthiness Division
CAA CZ
2001-11-05 CFM International: Amendment 39-12246. Docket
2001-NE-18-AD.
Applicability: This airworthiness directive (AD) is applicable to CFM
International CFM56-2, -2B, -3, -5B, -5C and -7B series turbofan engines with a
No. 4 bearing, part number (P/N) 305-355-717-0, that has a serial number (SN)
listed in Table 1 of this AD installed. These engines are installed on, but not
limited to Airbus Industrie A319, A320, A321 and A340 series airplanes, Boeing
737 and KC135 series airplanes, and McDonnell Douglas DC8 series airplanes.
Note 1: This AD applies to each engine identified in the preceding
applicability provision, regardless of whether it has been modified, altered,
or repaired in the area subject to the requirements of this AD. For engines
that have been modified, altered, or repaired so that the performance of the
requirements of this AD is affected, the owner/operator must request approval
for an alternative method of compliance in accordance with paragraph (h) of
this AD. The request should include an assessment of the effect of the
modification, alteration, or repair on the unsafe condition addressed by this
AD; and, if the unsafe condition has not been eliminated, the request should
include specific proposed actions to address it.
Compliance: Compliance with this AD is required as indicated, unless
already done.
To prevent bearing failures, which could cause an engine failure, do the
following:
Number of Hours Until Number of Engines Must Be Limited
(a) Limit the number of engines with a suspect No. 4 bearing that has a SN
listed in the following Table 1 of this AD to one on each airplane within 300
hours time-in-service (TIS) after the effective date of this AD, but no later
than July 1, 2001, whichever occurs earlier:
Table 1.--CFM56 Engines With Suspect No.
4 Bearings
|
Part No. |
Part Serial No. |
Engine |
Engine Serial |
|
305-355-717-0 |
DB387598-C |
2B |
714172 |
|
305-355-717-0 |
DB387670-5 |
2 |
692251 |
|
305-355-717-0 |
DB387608-F |
3 |
725109 |
|
305-355-717-0 |
DB387612-8 |
3 |
720493 |
|
305-355-717-0 |
DB387614-4 |
3 |
721253 |
|
305-355-717-0 |
DB387625-H |
3 |
720383 |
|
305-355-717-0 |
DB387647-Y |
3 |
857594 |
|
305-355-717-0 |
DB387650-6 |
3 |
721237 |
|
305-355-717-0 |
DB387651-5 |
3 |
726245 |
|
305-355-717-0 |
DB387661-K |
3 |
856671 |
|
305-355-717-0 |
DB387604-K |
5B |
779783 |
|
305-355-717-0 |
DB387605-J |
5B |
779784 |
|
305-355-717-0 |
DB387603-L |
5B |
779785 |
|
305-355-717-0 |
DB387590-5 |
5B |
779786 |
|
305-355-717-0 |
DB387591-4 |
5B |
779787 |
|
305-355-717-0 |
DB387634-3 |
5B |
779796 |
|
305-355-717-0 |
DB387658-D |
5B |
779798 |
|
305-355-717-0 |
DB387654-2 |
5B |
779799 |
|
305-355-717-0 |
DB387683-G |
5B |
779802 |
|
305-355-717-0 |
DB387648-W |
5B |
779803 |
|
305-355-717-0 |
DB387660-L |
5B |
779804 |
|
305-355-717-0 |
DB387606-H |
5B |
779960 |
|
305-355-717-0 |
DB387618-O |
5B |
779961 |
|
305-355-717-0 |
DB387599-B |
5C |
741948 |
|
305-355-717-0 |
DB387609-Y |
7B |
876395 |
|
305-355-717-0 |
DB387611-7 |
7B |
876399 |
|
305-355-717-0 |
DB387615-3 |
7B |
876400 |
|
305-355-717-0 |
DB387601-N |
7B |
876401 |
|
305-355-717-0 |
DB387594-1 |
7B |
876403 |
|
305-355-717-0 |
DB387592-3 |
7B |
876405 |
|
305-355-717-0 |
DB387610-8 |
7B |
876406 |
|
305-355-717-0 |
DB387600-P |
7B |
876410 |
|
305-355-717-0 |
DB387649-V |
7B |
876421 |
|
305-355-717-0 |
DB387678-C |
7B |
876423 |
|
305-355-717-0 |
DB387652-4 |
7B |
876424 |
|
305-355-717-0 |
DB387659-C |
7B |
876429 |
|
305-355-717-0 |
DB387693-1 |
7B |
876431 |
|
305-355-717-0 |
DB387655-1 |
7B |
876432 |
|
305-355-717-0 |
DB387684-F |
7B |
876434 |
|
305-355-717-0 |
DB387588-V |
7B |
876727 |
|
305-355-717-0 |
DB387657-E |
7B |
876729 |
|
305-355-717-0 |
DB387653-3 |
7B |
876730 |
|
305-355-717-0 |
DB387597-D |
7B |
877404 |
|
305-355-717-0 |
DB387602-M |
7B |
877408 |
|
305-355-717-0 |
DB387589-U |
7B |
877427 |
|
305-355-717-0 |
DB387656-O |
7B |
875232 |
|
305-355-717-0 |
DB387671-4 |
7B |
874219 |
Replacement of Suspect No. 4 Bearings
(b) For engines that have a suspect No. 4 bearing that has a SN listed in Table
1 of this AD, replace the No. 4 bearing with a serviceable part within 2,000
hours TIS, after the effective date of this AD, but no later than December 31,
2001, whichever occurs earlier.
Installation of Suspect No. 4 Bearings
(c) After the effective date of this AD, do not install any No. 4 bearing that
has a SN listed in Table 1 of this AD.
(d) After the effective date of this AD, do not install any engine that has a
No. 4 bearing with a serial number listed in Table 1 of this AD.
Initial Inspections for Chip Detector Indications
(e) For engines that have a suspect No. 4 bearing that has a SN listed in Table
1 of this AD, inspect for magnetic chip indications within in the specified
times, and if necessary, disposition as follows:
(1) For CFM56-5B engines, check electronic magnetic chip detector (EMCD) visual
indicator within 50 to 75 hours TIS after the effective date of this AD.
(2) For CFM56-5C engine (741948), check for class 2 Electronic Centralized
Aircraft Monitor (ECAM) message "MAGNETIC CHIP DETECTED" before
further flight.
(3) For CFM56-7B engines equipped with Debris Monitoring System (DMS) option,
check Flight Management Computer--Master Control Display Unit (FMC-MCDU) for
message 79-2114 before further flight.
(4) For CFM56-7B engines equipped with classic magnetic chip detectors (MCD),
inspect aft sump MCD within 50 to 75 hours TIS after the effective date of this
AD.
(5) For CFM56-2, -2B, and -3 engines, inspect aft sump MCD within 50 to 75
hours TIS after the effective date of this AD.
(6) If bearing particles are found, remove engine from service before further
flight.
Repetitive Inspections for Chip Detector Indications
(f) Thereafter, inspect for chip indications in accordance with the specified
time-since-last-inspection (TSLI), and if necessary, disposition as follows:
(1) For CFM56-5B engines, check EMCD visual indicator every 50-75 hours TSLI.
(2) For CFM56-5C engine (741948), check for class 2 ECAM message "MAGNETIC
CHIP DETECTED" after every flight.
(3) For CFM56-7B engines equipped with DMS option, check FMC-MCDU for message
79-2114 once per day.
(4) For CFM56-7B engines equipped with classic MCD, inspect aft sump MCD every
50-75 hours TSLI.
(5) For CFM56-2, -2B, and -3 engines, inspect aft sump MCD every 50-75 hours
TSLI.
(6) If bearing particles are found, remove engine from service before further
flight.
Terminating Action
(g) Replacement of a No. 4 bearing that has a SN listed in Table 1 of this AD
with a No. 4 bearing that does not have a SN listed in Table 1 of this AD is
terminating action for the repetitive inspection requirements specified in paragraph
(f) of this AD.
Alternative Methods of Compliance
(h) An alternative method of compliance or adjustment of the compliance time
that provides an acceptable level of safety may be used if approved by the
Manager, Engine Certification Office. Operators shall submit their request
through an appropriate FAA Principal Maintenance Inspector, who may add
comments and then send it to the Manager, Engine Certification Office.
Note 2: Information concerning the existence of approved alternative
methods of compliance with this airworthiness directive, if any, may be
obtained from the Engine Certification Office.
Special Flight Permits
(i) Special flight permits may be issued in accordance Secs. 21.197 and 21.199
of the Federal Aviation Regulations (14 CFR 21.197 and 21.199) to operate the
aircraft to a location where the requirements of this AD can be accomplished.
Effective Date of This AD
(j) This amendment becomes effective on June 11, 2001.