NOTE: You should measure the skin on the left and right sides of the airplane as shown in Part II, Skin Measurement. To get the measuring tool, contact Boeing. When you contact Boeing, you should also submit a purchase order for a Technical Service Agreement (TSA). With a TSA, Boeing will analyze the measurements and determine if the skin is within the limits necessary for RVSM.
If the analysis determines that the skin waviness is within the limits necessary for RVSM, Boeing will give an FAA form 8110-3 recommending approval.
(7) If there is a repair or modification, then:
(a)
For 737-200 airplanes built between Line Numbers 1 thru 330, verify that the repair or modification is the repair or modification shown in Service Bulletin 737-53-1111 and drawing 65C33596 (repair) or 65C33642 (modification). If it is not, remove the repair and install a repair or modification as shown in Service Bulletin 737-53-1111, or contact Boeing with details of the repair/modification for disposition.
(b)
For 737-200 airplanes built after Line Number 330, contact Boeing with details of the repair/modification for disposition.
(c)
If you contact Boeing for disposition, you should give Boeing the following
information:
1) the location of the repair/modification
2) the shape of the repair/modification
3) the orientation of the repair/modification
4) the thicknesses of the repair/modification parts
5) the fastener types, sizes, and locations.
501
May 01/98 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 51-10-0 Page 603
NOTE: You should measure the skin on the left and right sides of the airplane as shown in Part II, Skin Measurement. To get the measuring tool, contact Boeing. When you contact Boeing, you should also submit a purchase order for a Technical Service Agreement (TSA). With a TSA, Boeing will analyze the measurements and determine if the skin is within the limits necessary for RVSM.
If the analysis determines that the skin waviness is within the limits necessary for RVSM, Boeing will give an FAA form 8110-3 recommending approval.
(d) For all 737-200 airplanes, there must be no more than two repairs or modifications that are within, or extend into, the inspection area. You can have a total of two repairs or modifications on one side of the airplane, or you can have one repair or modification on both sides of the airplane. Also, for all 737-200 airplanes, if you have an external repair, it must be within the limits shown in the 737 SRM, Section 51-70, Fig. 9.
(8) If the skin around the pitot-static probes has no unrepaired damage, is within the SRM smoothness limits shown in Step E, and has no more than two Boeing-approved repairs that are within the repair limits shown in the 737 SRM, Section 51-70, Fig. 9, then no more action is necessary.
NOTE: If, after an airplane is qualified for RVSM flight, you find new damage or new repairs in the vicinity of the pitot-static probes, refer to the 737 SRM, Section 51-70, Fig. 5 and Fig. 9, and make sure the damage or the repairs are within smoothness requirements. If the skin is not within smoothness requirements, refer to 737 AMM 51-10-00 for information on how to measure the skin, and contact Boeing.
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51-10-0 Page 604 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. May 01/98
4. Part II - Skin Measurement
A. Procedure
WARNING: DO NOT MEASURE THE AIRPLANE WHILE THE PITOT-STATIC PROBES ARE HOT. THE PITOT-STATIC PROBES ARE HEATED TO 1000°F AND CAN SEVERELY BURN YOU IF YOU TOUCH ONE.
(1) Open these circuit breakers on the P18-3 panel and attach “DO NOT OPERATE” flags on
them. Circuit Breaker Name C00523 UPPER LEFT CAPT PITOT STATIC C00524 LOWR RT CAPT PITOT STATIC C00525 UPPER RT F/O PITOT STATIC C00522 UPPER LEFT F/O PITOT STATIC C708(a) ANGLE OF AIRFLOW SENSOR – RIGHT C238 ANGLE OF AIRFLOW SENSOR – LEFT
(a) Some airplanes do not have an Angle of Airflow (AOA) sensor on the right side of the plane.
(2)
Install mylar tapes on the skin as shown in Fig. 602.
(3)
Measure the skin on the right and left sides of the airplane as shown in Fig. 603.
NOTE: If many people move around inside the cabin of the airplane, it is possible that the airplane will rock and you will not get accurate measurements.
(4)
Record your measurements on a copy of the table shown in Fig. 604 and 605.
(5)
After you take all of the measurements, place the tool on the skin at WL 230.0 and measure the skin at position 1 again. Record this measurement at the bottom of the worksheet in the space indicated.
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