Regulatory Evaluation 

Docket No. FAA- Directorate Identifier: -AD 

(lyou make changes to 1he Falues in 1he table below, you1m1st ensure the totals update accordingly. Jj' 

they do not, click (or Tab) into and then ow f?{!he changed cell. 

Estimated Costs: 

Action Costs per Product (e.g., aircraft, engine, 

(e.g., Inspection, propeller, appliance) 

Work-hours Labor Parts Cost Total Costs Number of Total Cost replacement) (include cost (labor + u.s. for U.S. Fleet Do not include oncondition costs here access, testing, (@$85/h parts) Registered 

and close-up) our) Products 

Open Access Panel 3.0 ' , ! •q I)) 57 ' ; .5 ~5.ftll 

Part 1. Detailed 

inspection of the aft 

fairing for cracks 9.0 <\' nq ' I)'' (Hi 57 ' ( ' 't 

and heat damage, 

Figure 1 and 2 

Part 1. 

Conductivity 

inspection (lACS 19.0 , U>l·· o 

1.<" '.til) 57 I' II( 

values) ofthe upper 0 

surface, Figure 3 

and4 

Part 1. Detailed 

inspection of the 

heat shield primary 6.0 'i " 0 : l I II 57 ) II 

seal for wear 

damage, Figure 5 

and 6 

Close Access Panel 3.0 ' ')t {I ) 57 1 1 -'·on 

It rl/1 0 1)1 1 '· (J (ltl 

I'll( •, (I (\I I \ () ( ;() 

{I l}(l \ f) (i{l ' ! I Ill' 

r 'It ' {t 00 ' l (l(' 

<, \J If( I 'I ! HI 11 on ., () \)(t \ 0 {I( I '· I! 11(1 

u I)( I "-. ( ) IHt I II . 

" p PP ' ( 1 Of I tt nn 

' II \)1' ' () (111 n l'fJ 

' !1. {j(l ... ll,l H1 ~ 0 1;0 

', il l)'l . (J (HI I) ( 0 

'> 0 1)0 \ (\ 0(1 \ n.or; 

) 0.1){1 1., (I Ill I {l (•f! 

I 1 !J( ' I I ilfl (I (.1\ 

' l ! )f! ()'!II ' •: 1 

The known number of products in compliance: 
Total Costs of compliance for U.S. fleet: l $193,800 

Costs covered under warranty (if /mown) l $ 

On-Condition Costs: ~ 

Action Work-hours Labor cost Parts Cost Cost per Product 

(e.g., Inspection, (include access, (@$85/hour) 

replacement) testing, and closeup) 

Condition 2, Wear 

damage found on 10.0 $1 ,940 heat shield primary 

seal. 

Combined 

Condition 5 and 6, 

Replace any parts 

cracked, replace 110.0 

any heat damage or $52,992 . I 

wear damage, 

Complete Part 2 

Figure 7 through 12 

I 1'1 I <!1, 

1:c, I !iii 

Special considerations for Economic Analysis (Use this field to explain anything in the Estimated Costs table 

that was assumed or might not be obvious. This field can also be used to e;'<plain warranty costs): 

Per SB 777-54-0030, the optional terminating action of replacing the thermal insulation blankets, 

rub strips on the seal depressor, and the aft fairing drain sump would cost the operators 

approximately $ 116,000 in material costs and 151 man hours in labor costs. 

For all other operators, incorporating SB 777-54-0030 would be equally as difficult and complex 

as accomplishing the repeat inspections per SB 777-54A0031. 

It is Boeing's reccomendation that operators incorporate the new design versus continuing to do 

the repeat inspection. 

Executive Order 12866: 

Could the AD be considered a "significant regulatory acti ?~· 

YES* 0 NO [;g) 

*Explanation: 

DOT Regulatory Policies and Procedures: 

Is the AD significant? ~ 

YES* 0 NO [;g) 

*Explanation: 
Regulato1-y Flexibility Act: 

Will the AD have a significant economic impact on a substantial number of small entities? Explain for 

either a Yes or No answer ~ 

YESD NO~ 

Explanation: 

Intrastate Aviation in Alaska: 

This AD could affect intrastate aviation in Alaska. Is it appropriate to include specific requirements for 

aircraft operated in Alaska where aviation might be the only mode of transportation? -

YES*0 NO~ 

*Explanation: