635 

Federal Aviation Administration, DOT 

Pt. 27 

(3) A plan for submitting a draft of 

all compliance items required by this 
subpart for review by the FAA Over-
sight Office not less than 60 days before 
the applicable compliance date. 

(b) 

Compliance dates for compliance 

plans.  The following persons must sub-
mit the compliance plan described in 
paragraph (a) of this section to the 
FAA Oversight Office for approval on 
the following schedule: 

(1) For holders of type certificates, 

no later than 90 days after January 11, 
2008. 

(2) For holders of supplemental type 

certificates no later than 180 days after 
January 11, 2008. 

(3) For applicants for changes to type 

certificates whose application are sub-
mitted before January 11, 2008, no later 
than 180 days after January 11, 2008. 

(c) 

Compliance Plan Implementation. 

Each affected person must implement 
the compliance plan as approved in 
compliance with paragraph (a) of this 
section. 

PART 27—AIRWORTHINESS STAND-

ARDS: NORMAL CATEGORY 
ROTORCRAFT 

Subpart A—General 

Sec. 
27.1

Applicability. 

27.2

Special retroactive requirements. 

Subpart B—Flight 

G

ENERAL

 

27.21

Proof of compliance. 

27.25

Weight limits. 

27.27

Center of gravity limits. 

27.29

Empty weight and corresponding cen-

ter of gravity. 

27.31

Removable ballast. 

27.33

Main rotor speed and pitch limits. 

P

ERFORMANCE

 

27.45

General. 

27.49

Performance at minimum operating 

speed. 

27.51

Takeoff. 

27.65

Climb: all engines operating. 

27.67

Climb: one engine inoperative. 

27.71

Autorotation performance. 

27.75

Landing. 

27.87

Height-speed envelope. 

F

LIGHT

C

HARACTERISTICS

 

27.141

General. 

27.143

Controllability and maneuverability. 

27.151

Flight controls. 

27.161

Trim control. 

27.171

Stability: general. 

27.173

Static longitudinal stability. 

27.175

Demonstration of static longitudinal 

stability. 

27.177

Static directional stability. 

G

ROUND AND

W

ATER

H

ANDLING

 

C

HARACTERISTICS

 

27.231

General. 

27.235

Taxiing condition. 

27.239

Spray characteristics. 

27.241

Ground resonance. 

M

ISCELLANEOUS

F

LIGHT

R

EQUIREMENTS

 

27.251

Vibration. 

Subpart C—Strength Requirements 

G

ENERAL

 

27.301

Loads. 

27.303

Factor of safety. 

27.305

Strength and deformation. 

27.307

Proof of structure. 

27.309

Design limitations. 

F

LIGHT

L

OADS

 

27.321

General. 

27.337

Limit maneuvering load factor. 

27.339

Resultant limit maneuvering loads. 

27.341

Gust loads. 

27.351

Yawing conditions. 

27.361

Engine torque. 

C

ONTROL

S

URFACE AND

S

YSTEM

L

OADS

 

27.391

General. 

27.395

Control system. 

27.397

Limit pilot forces and torques. 

27.399

Dual control system. 

27.411

Ground clearance: tail rotor guard. 

27.427

Unsymmetrical loads. 

G

ROUND

L

OADS

 

27.471

General. 

27.473

Ground loading conditions and as-

sumptions. 

27.475

Tires and shock absorbers. 

27.477

Landing gear arrangement. 

27.479

Level landing conditions. 

27.481

Tail-down landing conditions. 

27.483

One-wheel landing conditions. 

27.485

Lateral drift landing conditions. 

27.493

Braked roll conditions. 

27.497

Ground loading conditions: landing 

gear with tail wheels. 

27.501

Ground loading conditions: landing 

gear with skids. 

27.505

Ski landing conditions. 

W

ATER

L

OADS

 

27.521

Float landing conditions. 

M

AIN

C

OMPONENT

R

EQUIREMENTS

 

27.547

Main rotor structure. 

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