(10)
AMM 78-31-00/201, Fan Thrust Reverser System
D.
Access
(1)
Location Zones
506 Engine No. 1
606 Engine No. 2
(2)
Access Panels
5737L/5837R Fan Cowl Assy
5746L/5846R Fan Cowl Assy
5738L/5838R Thrust Reverser Cowl Assy
5739L/5839R Thrust Reverser Cowl Assy
E.
Procedure
S 825-011-C00
(1)
Prepare for the MEC trim
(a)
Make sure that the Autothrottle PLA synchro is correct.
(b)
Adjust it if it is necessary (AMM 22-31-11/501).
(c)
Make sure that the specific gravity position is correct (Fig. 502).
NOTE: If you change to a different fuel type, you must change
____ the specific gravity position on the MEC. If the nominal value of the specific gravity is different than the standard value in the table, the actual value should be used. On a flight leg with more than one type of fuel, no specific gravity adjustment of the MEC is necessary.
(d) Open the left fan cowl panel (AMM 71-11-02/201).
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
71-00-00
ALL ú ú C06 Page 552 ú Mar 12/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
TEST NO. 6 - MAIN ENGINE CONTROL (MEC) TRIM
___________________________________________
(e) Make sure that the specific gravity position for the type of fuel agrees with the table:
~............................................................................... | FUEL | SPECIFIC GRAVITY SETTING | *[1] MAXIMUM ADJUSTMENT | ................................................................................. | JET A, JET A1 | 0.82 | 0.78 | | JP-1, JP-5, JP-8 | | | ................................................................................. | JET B, JP-4 | 0.77 | 0.73 | 2..................…...............................…............................1 *[1] The fuel enrichment is only allowable on engines that have a 5th stage start
bleed valve (CFMI SB 72-298). (AMM 71-00-58/101).
(f)
If it is necessary, adjust the specific gravity position as follows: 1) Use a 5/32 inch hexagonal wrench to turn the screw in the
center of the specific gravity plate. 2) Align the scribe mark on the screw with the applicable mark on the plate.
(g)
Close the left fan cowl panel (AMM 71-11-02/201).
S 825-012-C00
(2) Trim the Main Engine Control (MEC)
CAUTION: ENGINES WITH THE MEC P/N 9368M57P11;
_______ MAKE SURE THAT THE ENGINE HAS THE CFMI SB 73-006 INSTALLED. THE ENGINES THAT HAVE THE CFMI SB 73-006 SHOW THE SB 73-006 (REVISION 1 OR SUBSEQUENT) ON THE SERVICE BULLETIN DATA PLATE OF THE MEC. WITHOUT THE SB YOU CAN HAVE UNSATISFACTORY ENGINE PERFORMANCE.
(a)
Open the left thrust reverser (AMM 78-31-00/201).
(b)
Do the travel check for the VSV feedback cable and the static rig check (AMM 75-31-02/501).
(c)
Do the travel check for the VBV feedback cable and the static rig check (AMM 75-32-05/501).
(d)
Make sure that the specific gravity position is correct. 1) Adjust it if it is necessary.
(e)
Open the right fan cowl panel (AMM 71-11-02/201).
(f)
Do the gain check of the PLA (power lever angle) transducer (AMM 73-21-00/501).
(g)
Do the travel test for the engine control system (AMM 76-11-00/501).
(h)
Close the left thrust reverser (AMM 78-31-00/201).
(i)
Close the fan cowl panels (AMM 71-11-02/201).
(j)
Do the idle leak check (Test No. 3).
(k)
Do the idle speed check (Test No. 4).
(l)
Do the check for the part power trim.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
71-00-00
ALL ú ú C07 Page 553 ú Nov 12/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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