# June28th'2012**-^EMBRAER GCF-0760/2012** **bwidmmbm AACB** **Embraer S.A.** **Av. Bngadeiro** **Fana Lima,** **2.170 12227-901** **S.J. dos** **Campos SP** **Brasil Fone;** **(12) 3927-6481** **Fax. (12)** **3927-1184 PC:** **179 US** **Department of** **Transportation 1200** **New Jersey** **Avenue, SE** **West Building** **Ground Floor** **RoomW12-140 Washington,** **DC 20590** **Subject: EMB-550** **FAA Type** **Validation**

### Re-petition**to the** **Exemption from 14** **CFR 25.809** **(a) Amdt.** **25-116 Please** **find enclosed** **Embraer re-petition** **to adequately** **address the** **Public Interest** **statement requirement** **of 14** **CFR 11.81** **(d) according** **to FAA** **comments.**

### The**Embraer initial** **petition has** **been done** **by GCF-0173/2012** **which was** **added to** **public docket** **no. FAA-2012-0302.** **Sincerely, 4f^P-<<^** **t*~-yw-w.W*4****RafopiGustavofassmawai**

# Sergto**Aijgusto Viana** **de Carvall/6** **yaeZ!!Less Office** **Airworthiness Manager** **C.c: ANAC-Willian** **Yoshinori Tanji** **(PCM EMB-550)** **14 CFR** **11.81 (a)** **Contact Information:** 

### Sergio**Augusto Viana** **de Carvalho** **Embraer Airworthiness** **Manager Av.** **Brigadeiro Faria** **Lima, 2170-PC** **179**

### 12227-901**Sao Jose dos** **Campos, SP** **Brazil Phone:** **55-12-3927-3543**

### Fax:**55-12-3927-1184 14** **CFR 11.81** **(b) Specific** **Section from** **Which Exemption** **is required** **25.809 Emergency** **exit arrangement:** **(a) Each** **emergency exit,** **including each** **flightcrew emergency** **exit, must** **be moveable** **door or** **hatch in** **the external** **walls of** **the fuselage,** **allowing an** **unobstructed opening** **to the** **outside. In** **addition, each** **emergency exit** **must have** **means to** **permit viewing** **of the** **conditions outside** **the exit** **when the** **exit is** **closed. The** **viewing means** **may be** **on or** **adjacent to** **the exit** **provided no** **obstructions exist** **between the** **exit and** **the viewing** **means. Means** **must also** **be provided** **to permit** **viewing of** **the likely** **areas of** **evacuee ground** **contact. The** **likely areas** **of evacuee** **ground contact** **must be** **viewable during** **all lighting** **conditions with** **the landing** **gear extended** **as well** **as in** **all conditions** **of landing** **gear collapse.** **14 CFR** **11.81 <c)** **Extent of** **Relief and** **Reason for** **Seeking Relief** **Petition and** **General Information:** **Under the** **provisions set** **forth in** **Title 14** **Code of** **Federal Regulations** **(14 CFR)** **11.81, Embraer** **is seeking** **an exemption** **to allow** **partial relief** **from 25.809(a)** **at Amendment** **25-116 for** **the Type** **III overwing** **exit on** **the EMB-550** **airplane. The** **overwing hatch** **is located** **inside the** **lavatory and** **has window** **that provides** **an effective** **means to** **assess external** **conditions prior** **to exit** **opening. This includes** **viewing of** **the wing** **surface where** **the evacuees** **would make** **their initial** **contact up** **to**

### the**end of** **the scape** **route on** **the wing** **considering all** **lighting conditions** **with the** **landing gear** **extended as** **well as** **in all** **conditions of** **landing gear** **collpase. Partial** **relief is** **being sought** **from the** **requirement since** **this outside** **viewing means** **does not** **permit viewing** **of the** **likely area** **of evacuee** **ground contact** **prior to** **exit opening** **during all** **lighting conditions** **with the** **landing gear** **extended as** **well as** **in all** **conditions of** **landing gear** **collapse.**

### Relief**is necessary** **since literal** **compliance with** **the rule** **would require** **extensive design** **changes to** **the airplane** **(exit relocation)** **to permit** **viewing of** **the likely** **areas of** **evacuee ground** **contact during** **all lighting** **conditions and** **with the** **landing gear extended** **and in** **conditions of** **landing gear** **collapse. Making** **this type** **of design** **change would** **not**

### enhance**the level** **safety provided** **for the** **occupants and** **it would** **impact introduction** **of the** **EMB-550 airplane.** 

# ESV1BRAER**Background: In** **an emergency** **situation it** **is generally** **accepted that** **an exit** **should not** **be opened** **if opening** **it would** **create more** **hazardous situation** **for the** **occupants of** **the airplane.** **With Amendment** **25-116 14** **CFR 25.809(a)** **now includes the** **requirement that** **an outside** **viewing means** **at emergency** **exits permit** **viewing of** **the likely** **area of** **evacuee ground** **contact and** **that the** **likely area** **of evacuee** **contact be** **viewable during** **all lighting** 

### conditions**with the** **landing gear** **extended as** **well as** **in all** **conditions of** **landing gear** **collapse. The** **EMB-550 airplane** **is an** **executive jet** **with maximum** **occupancy of** **12 passengers** **and is** **provided with** **Type III** **overwing exit** **hatch located** **inside the** **lavatory. The** **hatch window** **provides an** **effective means** **to assess** **external conditions** **when deciding** **whether or** **not to** **open the** **exit. This** **includes viewing** **of the** **wing surface** **where the** 

### evacuees**would make** **their initial** **contact up** **to the** **end of** **the scape** **route on** **the wing** **considering all** **lighting conditions** **with the** **landing gear** **extended as** **well as** **in all** **conditions of** **landing gear** **collpase. This** **also includes** **viewing of** **the ground** **near where** **the evacuees** **would normally** **be expected** **to make** **their initial** **contact. In** **addition, an** **emergency lighting** **system is** **provided according** **14 CFR** **25.812 (g)(1)** **and an** **escape route** **is provided** **according 14** **CFR 25.810** **(c). Since** **the end** **of the** **escape route** **on the** **wing terminates** **in height** **distance from** **the ground** **of less than** **feet there** **is no** 

### emergency**egress assist** **means installed.** **Once the** **evacuees step** **on the** **wing and** **reach the** **end of** **the escape** **route on** **the wing** **they will** **be able** **to see** **the ground** 

### contact**area considering** **all lighting** **conditions and under** **all conditions** **of landing** **gear collapse.** **Therefore, they** **will get a** **good sense** **of whether** **or not** **there is** **significant**

### hazard**on the** **ground. While** **the overwing** **exit window** **provide an** **excellent means** **for assessing** **the outside conditions,** **this does** **not allow** **direct viewing** **of the** **ground where** 

### the**evacuees would** **normally be** **expected to** **make their** **initial ground** **contact. This** **is due** **to the** **relative distance** **of the** **exit location** **and the** **ground contact** **area.**

### Partial**relief from** **25.809(a) at** **Amendment 25-116** **is necessary** **because design** **of the** **EMB-550 airplane** **is complete** **and it** **would require** **extensive design** **changes for** **the overwing** **exit to** **comply with** **the outside viewing** **requirements with** **no material** **difference in** **the level** **of safety.** **14 CFR** **11.81 (d)** **Reason Why** **Granting Relief** **Would be** **In Public** **Interest Public** **Interest:**

### The**granting of** **this exemption** **is in** **the public** **interest because** **delay in** **certification and** **introduction of** **the EMB-550** **in order** **to fully** **comply with** **25.809(a) would** **cause delay** **in delivery** **and introduction** **into service** **of the** **affected aircraft.** **While Embraer** **is not** **an American** **manufacturer, the** **suppliers of** **the engines** **and**

### large**majority of** **the avionics,** **seats, in-flight** **entertainment and** **mechanical systems** **are in** **the United** **States.**

### delay**in delivery** **will cause** **an unnecessary** **loss of** **income to** **these suppliers** **with the** **associated adverse** **impact on** **the economy** **and the** **trade balance** **of the** **United States.** 

### EMBRAER**These effects** **on the** **American economy** **as whole,** **with no** **associated increase** **in safety,** **are clearly** **not in** **the public** **interest. In** **addition, design** **change at** **this point** **to fully** **comply with** **25.809(a) will** **increase weight** **of the** **airplane with** **an associated** **increase in** **fuel consumption.** **In addition** **to the** **adverse impact** **this would** **have on** **the operator** **or his** **customers who** **would have** **to compensate** **for this** **increased cost** **of operation,** **the increased** **fuel consumption** **will result** **in increased** **emissions, which** **would be** **counter to** **the public** **interest. 14** **CFR 11.81** **(e) Reasons** **Why Exemption** **would Not** **Adversely Affect** **Safety Justification:** **During an** **airplane emergency** **evacuation, there** **is the** **potential for** **an external** **hazard that** **could pose** **an immediate** **threat to** **the occupants** **of the** **airplane if** **an exit** **was opened.** **While fire** **is the** **principle external** **hazard, there** **are other** **types of** **hazards such** **as water** **or large** **obstructions that** **could make** **not opening** **an exit** **the preferred** **course of** **action. However,** **due to** **the viewing** **area provided** **by the** **overwing hatch** **window during** **all lighting** **conditions and** **with the** **landing gear** **extended and** **in any** **conditions of** **landing gear** **collapse, it** **is very** **likely that** **any severe** **external hazard** **that could create** **an immediate** **hazard to** **the occupants** **could be** **detected prior to** **deciding whether** **or not** **to open** **the overwing** **exit. Therefore,** **there is** **no appreciable** **difference between** **the level** **of safety** **provided by** **the outside** **viewing means** **provided for** **the EMB-550** **overwing exit** **and that** **intended by** **the new** **regulation. 14** **CFR 11.81** **(f) Summary** **For Publication** **In Federal** **Register**

### Embraer**requests an** **Exemption from** **14 CFR** **25.809(a) Amdt. 25-116** **for the** **Type III** **overwing exit** **on the** **EMB-550 airplane.** **14 CFR** **11.81 (g)** **Additional Information** **to Support** **Request Conclusions:** **For the** **EMB-550 airplane** **the overwing** **hatch window** **provides an** **effective means** **to**

### assess**external conditions** **when deciding** **whether or** **not to** **open the** **overwing hatch.** **This includes** **viewing of** **the wing** **area where** **the evacuees** **would make** **their initial** **contact after** **opening the** **exit considering** **all lighting** **conditions with** **the landing** **gear**

### extended**as well** **as in** **all conditions** **of landing** **gear collapse.** **This also** **includes viewing** **of the** **ground near** **where the** **evacuees would** **normally be** **expected to** **make their** **initial contact.** **The overwing** **hatch window** **provides an** **external viewing** **means equivalent** **to**

### that**intended by** **the new** **regulation, which** **Embraer believes** **was the** **FAA's stated** **intent when** **codifying the** **requirement for** **an outside** **viewing means** **at the** **emergency**

### exits.**Passenger and** **crew safety** **will not** **be degraded** **by a grant** **of this** **exemption petition.**